mi web sale descentrada

Hola a todos!!
Mi web es esta: www.victorparejo.es/principal.html

No entiendo por qué sale descentrada. Creo que la hice en un monitor con una resolución distinta a la habitual y ahora depende en qué monitor la veas, sale descentrada de una forma o de otra.
¿Existe alguna manera para que se centre a cualquier resolución y en cualquier monitor?

Gracias!!!
Se centre quieres decir de que s eponga todo en el centro? Para eso justo desoues de la etiquta body pon <center> y justo antes de la etiquita </body> pon </center>
El caso es que tengo varias etiquetas body... Dónde debería ser???

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Diario de un Compositor</title>
<link rel="shortcut icon" href="http://www.victorparejo.es/vicpame.ico">

<style type="text/css">
<!--
body,td,th {
color: #E2E2CF;
overflow-x: hidden;
overflow-y: hidden;
}
body {
background-color: #000000;
background-image: url();
}
#Layer1 {
position:absolute;
left:430px;
top:220px;
width:422px;
height:211px;
z-index:1;
}
#Layer2 {
position:absolute;
left:545px;
top:504px;
width:406px;
height:34px;
z-index:2;
}
a:link {
color: #E2E2CF;
}
a:visited {
color: #DDDDD5;
}
#Layer3 {
position:absolute;
left:16px;
top:12px;
width:278px;
height:139px;
z-index:6;
}
#Layer4 {
position:absolute;
left:146px;
top:279px;
width:111px;
height:199px;
z-index:7;
}
#Layer5 {
position:absolute;
left:152px;
top:12px;
width:570px;
height:122px;
z-index:2;
}
#Layer6 {
position:absolute;
left:332px;
top:25px;
width:181px;
height:97px;
z-index:8;
}
#Layer7 {
position:absolute;
left:25px;
top:339px;
width:224px;
height:29px;
z-index:16;
}
#Layer8 {
position:absolute;
left:294px;
top:163px;
width:653px;
height:27px;
z-index:9;
}
#Layer9 {
position:absolute;
left:154px;
top:183px;
width:93px;
height:59px;
z-index:10;
}
#Layer10 {
position:absolute;
left:47px;
top:446px;
width:794px;
height:99px;
z-index:4;
}
#Layer11 {
position:absolute;
left:28px;
top:143px;
width:239px;
height:30px;
z-index:11;
}
#Layer13 { position:absolute;
width:523px;
height:267px;
z-index:11;
left: 275px;
top: 237px;
}
#Layer14 {
position:absolute;
width:69px;
height:17px;
z-index:15;
left: 16px;
top: 182px;
}
#Layer15 {
position:absolute;
left:865px;
top:203px;
width:118px;
height:296px;
z-index:14;
}
#apDiv1 {
position:absolute;
width:93px;
height:65px;
z-index:15;
left: -853px;
top: 30px;
}
#apDiv2 {
position:absolute;
width:200px;
height:115px;
z-index:13;
left: -890px;
top: -22px;
}
#apDiv3 {
position:absolute;
width:160px;
height:26px;
z-index:18;
left: 516px;
top: 501px;
}
#apDiv4 {
position:absolute;
width:399px;
height:21px;
z-index:19;
left: 484px;
top: 531px;
}
-->
</style>
<script src="Scripts/AC_RunActiveContent.js" type="text/javascript"></script>
</head>

<body>
<div id="apDiv4">Es imprescindible pulsar con el rat&oacute;n sobre el bot&oacute;n para entrar</div>
<div id="Layer16" style="position:absolute; left:449px; top:501px; width:400px; height:39px; z-index:17">
<div align="center">
<table width="98%" border="0">
<tr>
<td width="55%" height="25%"><div align="right">
<script language="JavaScript" type="text/javascript">
function Comprobar(pal) {
window.location=pal+".html"
}
</script>
</p>
</div></td>
<td width="45%"><div align="center">
<form>
<input name="clave" type="password" size="12" />
&nbsp;
<input type="button" name="enviar" value="Entrar" onclick="Comprobar(this.form.clave.value)" />
</form>
</div></td>
</tr>
</table>
</div>
</div>
<div id="apDiv3"><strong>Zona de Usuarios&nbsp;</strong><strong>&nbsp;&nbsp;<img src="imagenes/munequito.gif" alt="" width="21" height="26" /></strong></div>
<div id="Layer3">
<table width="280" height="130" border="0">
<tr>
<td><div align="center"><img src="imagenes/orquestahueso.jpg" width="200" height="125" /></div></td>
</tr>
</table>
</div>

<div id="Layer4">
<table width="110" height="191" border="0">
<tr>
<td width="151"><a href="index.html" target="marco">
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','presen','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','presen' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="presen.swf" />
<param name="quality" value="high" />
<embed src="presen.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','curriculum','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','curriculum' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="curriculum.swf" />
<param name="quality" value="high" />
<embed src="curriculum.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','trabajos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','trabajos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="trabajos.swf" />
<param name="quality" value="high" />
<embed src="trabajos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','musica','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','musica' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="musica.swf" />
<param name="quality" value="high" />
<embed src="musica.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','proyectos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','proyectos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="proyectos.swf" />
<param name="quality" value="high" />
<embed src="proyectos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','contacto','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','contacto' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="contacto.swf" />
<param name="quality" value="high" />
<embed src="contacto.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','100','height','23','src','librovisitas','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','librovisitas' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="100" height="23">
<param name="movie" value="librovisitas.swf" />
<param name="quality" value="high" />
<embed src="librovisitas.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
</table>
</div>
<div id="Layer5">
<table width="200" border="0">
<tr>
<td><img src="imagenes/cabeceraone.jpg" width="897" height="124" /></td>
</tr>
</table>
</div>
<div id="Layer6"><img src="imagenes/titulocabecera.gif" width="241" height="104" /></div>
<div id="Layer7">
<table width="229" border="0">
<tr>
<td><script language="JavaScript"><!--

if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {

var url="http://www.victorparejo.es/";
var title="Diario de un Compositor";

document.write('<A HREF="javascript:window.ext');
document.write('ernal.AddFavorite(url,title);" ');
document.write('onMouseOver=" window.status=');
document.write("'Añade esta web a tus favoritos'; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('"><img src="imagenes/recordarme.gif" width="92" height="92" border="0"> </a>');
}
else {
var msg = "Añadir esta web a favoritos";
if(navigator.appName == "Netscape") msg += " (CTRL-D)";
document.write(msg);
}

// --></script></td>
</tr>
</table>
</div>
<div id="Layer8">
<table width="655" border="0">
<tr>
<td><div align="center">
<script language="JavaScript1.1" src="frases.js">
</script>

&nbsp;</div></td>
</tr>
</table>
</div>
<div id="Layer9">
<div align="center"><img src="imagenes/bettho.gif" width="74" height="95" /></div>
</div>

<div id="Layer10"><img src="imagenes/nuotti.gif" width="824" height="99" /></div>
<div id="Layer11">
<table width="228" border="0">
<tr>
<td><SCRIPT><!--
dows = new Array("Domingo","Lunes","Martes","Miércoles","Jueves","Viernes","Sábado");
months = new Array("Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre");
now = new Date();
dow = now.getDay();
d = now.getDate();
m = now.getMonth();
h = now.getTime();
y = now.getYear();
document.write(dows+" "+d+" de "+months+" de "+y);
//--></SCRIPT>&nbsp;</td>
</tr>
</table>
<div id="Layer12" style="position:absolute; left:305px; top:30px; width:470px; height:315px; z-index:2">
<div align="center">
<iframe name="marco" src="presentacion.html" width="550" height="314" border="0" frameborder="0" allowtransparency=""></iframe>
</div>
</div>
</div>
<div id="Layer14">
<table width="88" border="0">
<tr>
<td><div align="right"><a href="principal.html"><img src="imagenes/espa.gif" width="18" height="10" border="0" /></a></div></td>
<td><a href="english.html"><img src="imagenes/english.gif" width="18" height="10" border="0" /></a></td>
</tr>
</table>
</div>
<div id="Layer15">
<table width="124" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><div align="center">&nbsp;&nbsp;<img src="imagenes/micro.jpg" width="86" height="78" /></div></td>
</tr>
<tr>
<td height="34"><div align="center">
&nbsp;&nbsp;
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','111','height','34','src','grabacion','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Versio…','bgcolor','#000000','movie','grabacion' ); //end AC code
</script><noscript>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="111" height="34">
<param name="BGCOLOR" value="#000000" />
<param name="movie" value="grabacion.swf" />
<param name="quality" value="high" />
<embed src="grabacion.swf" width="111" height="34" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Versio…" type="application/x-shockwave-flash" bgcolor="#000000" ></embed>
</object>
</noscript>
</div></td>
</tr>
<tr>
<td><div align="center"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="imagenes/pelicula.png" width="73" height="67" /> </div></td>
</tr>
<tr>
<td><div align="center">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','93','height','33','src','button2','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','button2' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="93" height="33">
<param name="movie" value="button2.swf" />
<param name="quality" value="high" />
<param name="BGCOLOR" value="#000000" />
<embed src="button2.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
</object></noscript>
</div></td>
</tr>
<tr>
<td><div align="center">&nbsp;<img src="imagenes/docencia.jpg" alt="" width="67" height="67" /></div></td>
</tr>
<tr>
<td><div align="center">
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…','width','93','height','33','src','button1','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','button1' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab…" width="93" height="33">
<param name="movie" value="button1.swf" />
<param name="quality" value="high" />
<param name="BGCOLOR" value="#000000" />
<embed src="button1.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
</object></noscript>
&nbsp;</div>
<div id="apDiv1"><a href='#' onclick="javascript:this.style.behavior='url(#default#homepage)';this.setHomePage('http://www.victorparejo.es.com');return false"><img src="imagenes/notaprincipal.gif" width="80" height="80" border="0" /></a></div></td>
</tr>
</table>
<div id="apDiv2"><img src="imagenes/floral2.gif" width="185" height="361" border="0" align="bottom" /></div>
</div>

</body>
</html>
Aqui tienes el codi como debería, si me hubieses dado un poco ams de tiempo hubiese coregido algun error, pero eso si: SE NOTA QUE NO ES TUYO, aunque no te voy a decir nada :P
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Diario de un Compositor</title>
<link rel="shortcut icon" href="http://www.victorparejo.es/vicpame.ico">

<style type="text/css">
<!--
body,td,th {
color: #E2E2CF;
overflow-x: hidden;
overflow-y: hidden;
}
body {
background-color: #000000;
background-image: url();
}
#Layer1 {
position:absolute;
left:430px;
top:220px;
width:422px;
height:211px;
z-index:1;
}
#Layer2 {
position:absolute;
left:545px;
top:504px;
width:406px;
height:34px;
z-index:2;
}
a:link {
color: #E2E2CF;
}
a:visited {
color: #DDDDD5;
}
#Layer3 {
position:absolute;
left:16px;
top:12px;
width:278px;
height:139px;
z-index:6;
}
#Layer4 {
position:absolute;
left:146px;
top:279px;
width:111px;
height:199px;
z-index:7;
}
#Layer5 {
position:absolute;
left:152px;
top:12px;
width:570px;
height:122px;
z-index:2;
}
#Layer6 {
position:absolute;
left:332px;
top:25px;
width:181px;
height:97px;
z-index:8;
}
#Layer7 {
position:absolute;
left:25px;
top:339px;
width:224px;
height:29px;
z-index:16;
}
#Layer8 {
position:absolute;
left:294px;
top:163px;
width:653px;
height:27px;
z-index:9;
}
#Layer9 {
position:absolute;
left:154px;
top:183px;
width:93px;
height:59px;
z-index:10;
}
#Layer10 {
position:absolute;
left:47px;
top:446px;
width:794px;
height:99px;
z-index:4;
}
#Layer11 {
position:absolute;
left:28px;
top:143px;
width:239px;
height:30px;
z-index:11;
}
#Layer13 { position:absolute;
width:523px;
height:267px;
z-index:11;
left: 275px;
top: 237px;
}
#Layer14 {
position:absolute;
width:69px;
height:17px;
z-index:15;
left: 16px;
top: 182px;
}
#Layer15 {
position:absolute;
left:865px;
top:203px;
width:118px;
height:296px;
z-index:14;
}
#apDiv1 {
position:absolute;
width:93px;
height:65px;
z-index:15;
left: -853px;
top: 30px;
}
#apDiv2 {
position:absolute;
width:200px;
height:115px;
z-index:13;
left: -890px;
top: -22px;
}
#apDiv3 {
position:absolute;
width:160px;
height:26px;
z-index:18;
left: 516px;
top: 501px;
}
#apDiv4 {
position:absolute;
width:399px;
height:21px;
z-index:19;
left: 484px;
top: 531px;
}
-->
</style>
<script src="Scripts/AC_RunActiveContent.js" type="text/javascript"></script>
</head>

<body>
<center>
<div id="apDiv4">Es imprescindible pulsar con el rat&oacute;n sobre el bot&oacute;n para entrar</div>
<div id="Layer16" style="position:absolute; left:449px; top:501px; width:400px; height:39px; z-index:17">
<div align="center">
<table width="98%" border="0">
<tr>
<td width="55%" height="25%"><div align="right">
<script language="JavaScript" type="text/javascript">
function Comprobar(pal) {
window.location=pal+".html"
}
</script>
</p>
</div></td>
<td width="45%"><div align="center">
<form>
<input name="clave" type="password" size="12" />
&nbsp;
<input type="button" name="enviar" value="Entrar" onclick="Comprobar(this.form.clave.value)" />
</form>
</div></td>
</tr>
</table>
</div>
</div>
<div id="apDiv3"><strong>Zona de Usuarios&nbsp;</strong><strong>&nbsp;&nbsp;<img src="imagenes/munequito.gif" alt="" width="21" height="26" /></strong></div>
<div id="Layer3">
<table width="280" height="130" border="0">
<tr>
<td><div align="center"><img src="imagenes/orquestahueso.jpg" width="200" height="125" /></div></td>
</tr>
</table>
</div>

<div id="Layer4">
<table width="110" height="191" border="0">
<tr>
<td width="151"><a href="index.html" target="marco">
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','presen','quality','high','pluginspa ge','http://www.macromedia.com/go/getflashplayer','movie','presen' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="presen.swf" />
<param name="quality" value="high" />
<embed src="presen.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','curriculum','quality','high','plugi nspage','http://www.macromedia.com/go/getflashplayer','movie','curriculum' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="curriculum.swf" />
<param name="quality" value="high" />
<embed src="curriculum.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','trabajos','quality','high','plugins page','http://www.macromedia.com/go/getflashplayer','movie','trabajos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="trabajos.swf" />
<param name="quality" value="high" />
<embed src="trabajos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','musica','quality','high','pluginspa ge','http://www.macromedia.com/go/getflashplayer','movie','musica' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="musica.swf" />
<param name="quality" value="high" />
<embed src="musica.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','proyectos','quality','high','plugin spage','http://www.macromedia.com/go/getflashplayer','movie','proyectos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="proyectos.swf" />
<param name="quality" value="high" />
<embed src="proyectos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','contacto','quality','high','plugins page','http://www.macromedia.com/go/getflashplayer','movie','contacto' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="contacto.swf" />
<param name="quality" value="high" />
<embed src="contacto.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
<tr>
<td height="25"><script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','heigh t','23','src','librovisitas','quality','high','plu ginspage','http://www.macromedia.com/go/getflashplayer','movie','librovisitas' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
<param name="movie" value="librovisitas.swf" />
<param name="quality" value="high" />
<embed src="librovisitas.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
</object></noscript>
</a></td>
</tr>
</table>
</div>
<div id="Layer5">
<table width="200" border="0">
<tr>
<td><img src="imagenes/cabeceraone.jpg" width="897" height="124" /></td>
</tr>
</table>
</div>
<div id="Layer6"><img src="imagenes/titulocabecera.gif" width="241" height="104" /></div>
<div id="Layer7">
<table width="229" border="0">
<tr>
<td><script language="JavaScript"><!--

if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {

var url="http://www.victorparejo.es/";
var title="Diario de un Compositor";

document.write('<A HREF="javascript:window.ext');
document.write('ernal.AddFavorite(url,title);" ');
document.write('onMouseOver=" window.status=');
document.write("'Añade esta web a tus favoritos'; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('"><img src="imagenes/recordarme.gif" width="92" height="92" border="0"> </a>');
}
else {
var msg = "Añadir esta web a favoritos";
if(navigator.appName == "Netscape") msg += " (CTRL-D)";
document.write(msg);
}

// --></script></td>
</tr>
</table>
</div>
<div id="Layer8">
<table width="655" border="0">
<tr>
<td><div align="center">
<script language="JavaScript1.1" src="frases.js">
</script>

&nbsp;</div></td>
</tr>
</table>
</div>
<div id="Layer9">
<div align="center"><img src="imagenes/bettho.gif" width="74" height="95" /></div>
</div>

<div id="Layer10"><img src="imagenes/nuotti.gif" width="824" height="99" /></div>
<div id="Layer11">
<table width="228" border="0">
<tr>
<td><SCRIPT><!--
dows = new Array("Domingo","Lunes","Martes","Miércoles","Juev es","Viernes","Sábado");
months = new Array("Enero","Febrero","Marzo","Abril","Mayo","Ju nio","Julio","Agosto","Septiembre","Octubre","Novi embre","Diciembre");
now = new Date();
dow = now.getDay();
d = now.getDate();
m = now.getMonth();
h = now.getTime();
y = now.getYear();
document.write(dows[dow]+" "+d+" de "+months[m]+" de "+y);
//--></SCRIPT>&nbsp;</td>
</tr>
</table>
<div id="Layer12" style="position:absolute; left:305px; top:30px; width:470px; height:315px; z-index:2">
<div align="center">
<iframe name="marco" src="presentacion.html" width="550" height="314" border="0" frameborder="0" allowtransparency=""></iframe>
</div>
</div>
</div>
<div id="Layer14">
<table width="88" border="0">
<tr>
<td><div align="right"><a href="principal.html"><img src="imagenes/espa.gif" width="18" height="10" border="0" /></a></div></td>
<td><a href="english.html"><img src="imagenes/english.gif" width="18" height="10" border="0" /></a></td>
</tr>
</table>
</div>
<div id="Layer15">
<table width="124" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><div align="center">&nbsp;&nbsp;<img src="imagenes/micro.jpg" width="86" height="78" /></div></td>
</tr>
<tr>
<td height="34"><div align="center">
&nbsp;&nbsp;
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0','width','111','height ','34','src','grabacion','quality','high','plugins page','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','bgco lor','#000000','movie','grabacion' ); //end AC code
</script><noscript>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="111" height="34">
<param name="BGCOLOR" value="#000000" />
<param name="movie" value="grabacion.swf" />
<param name="quality" value="high" />
<embed src="grabacion.swf" width="111" height="34" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" bgcolor="#000000" ></embed>
</object>
</noscript>
</div></td>
</tr>
<tr>
<td><div align="center"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="imagenes/pelicula.png" width="73" height="67" /> </div></td>
</tr>
<tr>
<td><div align="center">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','93','height ','33','src','button2','quality','high','pluginspa ge','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','butto n2' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="93" height="33">
<param name="movie" value="button2.swf" />
<param name="quality" value="high" />
<param name="BGCOLOR" value="#000000" />
<embed src="button2.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
</object></noscript>
</div></td>
</tr>
<tr>
<td><div align="center">&nbsp;<img src="imagenes/docencia.jpg" alt="" width="67" height="67" /></div></td>
</tr>
<tr>
<td><div align="center">
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','93','height ','33','src','button1','quality','high','pluginspa ge','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','butto n1' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="93" height="33">
<param name="movie" value="button1.swf" />
<param name="quality" value="high" />
<param name="BGCOLOR" value="#000000" />
<embed src="button1.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
</object></noscript>
&nbsp;</div>
<div id="apDiv1"><a href='#' onclick="javascript:this.style.behavior='url(#defa ult#homepage)';this.setHomePage('http://www.victorparejo.es.com');return false"><img src="imagenes/notaprincipal.gif" width="80" height="80" border="0" /></a></div></td>
</tr>
</table>
<div id="apDiv2"><img src="imagenes/floral2.gif" width="185" height="361" border="0" align="bottom" /></div>
</div>
</center>
</body>
</html> 
Me sigue saliendo totalmente a la izquierda, descentrada, eh? Con tu código sigue igual :(

Bueno, los códigos los fui copiando poco a poco de varios sitios hasta conseguir esto...
Para que os entereis como se centra una web, aplicais al div (padre de todos):

margin: 0 auto;

Con eso lo centras en todos los navegadores (como que 2 + 2 son 4!jejeje).

Un saludo.
Entiendo lo que dices, pero me he quedado igual. No sé dónde ponerlo. En cualquier caso, gracias.
Hehehe, pues algo más que se (Es que en CSS soy un poco nulo XD)
Esa propiedad aplicasela al body y quita el center (solo sirve para centrar texto, no divs.

Otra cosa mas que sabes!jejejeje

PD: Odio hacer tanto scroll
Pues copia el código que posteaste y reemplazalo, es como una copia de seguridad jeje
Sí sí, si por suerte estoy modificando todo en un principalb.html, no en el principal.html, no es preocupéis por eso. Pero el caso es que el margin: 0; no lo ha cuadrado... :/
Puffff, como se nota que no es tuyo el codigo, debes colocar eso en los estilos, es decir, en el .css (como no tienes de eso donde pone: body { .....
tu lo has escrito como texto plano, y magia no hace.
Esperando que se resuelva todo de una vez, copio el codigo que deberia funcionar:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
<title>Diario de un Compositor</title> 
<link rel="shortcut icon" href="http://www.victorparejo.es/vicpame.ico"> 
 
<style type="text/css"> 
<!--
body,td,th {
	color: #E2E2CF;
	overflow-x: hidden;
	overflow-y: hidden;
}
body {
        margin: 0 auto;
	background-color: #000000;
	background-image: url();
}
#Layer1 {
	position:absolute;
	left:430px;
	top:220px;
	width:422px;
	height:211px;
	z-index:1;
}
#Layer2 {
	position:absolute;
	left:545px;
	top:504px;
	width:406px;
	height:34px;
	z-index:2;
}
a:link {
	color: #E2E2CF;
}
a:visited {
	color: #DDDDD5;
}
#Layer3 {
	position:absolute;
	left:16px;
	top:12px;
	width:278px;
	height:139px;
	z-index:6;
}
#Layer4 {
	position:absolute;
	left:146px;
	top:279px;
	width:111px;
	height:199px;
	z-index:7;
}
#Layer5 {
	position:absolute;
	left:152px;
	top:12px;
	width:570px;
	height:122px;
	z-index:2;
}
#Layer6 {
	position:absolute;
	left:332px;
	top:25px;
	width:181px;
	height:97px;
	z-index:8;
}
#Layer7 {
	position:absolute;
	left:25px;
	top:339px;
	width:224px;
	height:29px;
	z-index:16;
}
#Layer8 {
	position:absolute;
	left:294px;
	top:163px;
	width:653px;
	height:27px;
	z-index:9;
}
#Layer9 {
	position:absolute;
	left:154px;
	top:183px;
	width:93px;
	height:59px;
	z-index:10;
}
#Layer10 {
	position:absolute;
	left:47px;
	top:446px;
	width:794px;
	height:99px;
	z-index:4;
}
#Layer11 {
	position:absolute;
	left:28px;
	top:143px;
	width:239px;
	height:30px;
	z-index:11;
}
#Layer13 {	position:absolute;
	width:523px;
	height:267px;
	z-index:11;
	left: 275px;
	top: 237px;
}
#Layer14 {
	position:absolute;
	width:69px;
	height:17px;
	z-index:15;
	left: 16px;
	top: 182px;
}
#Layer15 {
	position:absolute;
	left:865px;
	top:203px;
	width:118px;
	height:296px;
	z-index:14;
}
#apDiv1 {
	position:absolute;
	width:93px;
	height:65px;
	z-index:15;
	left: -853px;
	top: 30px;
}
#apDiv2 {
	position:absolute;
	width:200px;
	height:115px;
	z-index:13;
	left: -890px;
	top: -22px;
}
#apDiv3 {
	position:absolute;
	width:160px;
	height:26px;
	z-index:18;
	left: 516px;
	top: 501px;
}
#apDiv4 {
	position:absolute;
	width:399px;
	height:21px;
	z-index:19;
	left: 484px;
	top: 531px;
}
-->
</style> 
<script src="Scripts/AC_RunActiveContent.js" type="text/javascript"></script> 
</head> 
 
<body> 
<div id="apDiv4">Es imprescindible pulsar con el rat&oacute;n sobre el bot&oacute;n para entrar</div> 
<div id="Layer16" style="position:absolute; left:449px; top:501px; width:400px; height:39px; z-index:17"> 
  <div align="center"> 
    <table width="98%" border="0"> 
      <tr> 
        <td width="55%" height="25%"><div align="right"> 
            <script language="JavaScript" type="text/javascript"> 
function Comprobar(pal) { 
window.location=pal+".html" 
} 
            </script> 
          </p> 
</div></td> 
        <td width="45%"><div align="center"> 
          <form> 
          <input name="clave" type="password" size="12" /> 
            &nbsp;
<input type="button" name="enviar" value="Entrar" onclick="Comprobar(this.form.clave.value)" /> 
          </form> 
        </div></td> 
      </tr> 
    </table> 
  </div> 
</div> 
<div id="apDiv3"><strong>Zona de Usuarios&nbsp;</strong><strong>&nbsp;&nbsp;<img src="imagenes/munequito.gif" alt="" width="21" height="26" /></strong></div> 
<div id="Layer3"> 
  <table width="280" height="130" border="0"> 
    <tr> 
      <td><div align="center"><img src="imagenes/orquestahueso.jpg" width="200" height="125" /></div></td> 
    </tr> 
  </table> 
</div> 
 
<div id="Layer4"> 
  <table width="110" height="191" border="0"> 
    <tr> 
      <td width="151"><a href="index.html" target="marco"> 
        <script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','presen','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','presen' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
          <param name="movie" value="presen.swf" />
          <param name="quality" value="high" />
          <embed src="presen.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
        </object></noscript> 
      </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','curriculum','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','curriculum' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="curriculum.swf" />
        <param name="quality" value="high" />
        <embed src="curriculum.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','trabajos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','trabajos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="trabajos.swf" />
        <param name="quality" value="high" />
        <embed src="trabajos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','musica','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','musica' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="musica.swf" />
        <param name="quality" value="high" />
        <embed src="musica.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','proyectos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','proyectos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="proyectos.swf" />
        <param name="quality" value="high" />
        <embed src="proyectos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','contacto','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','contacto' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="contacto.swf" />
        <param name="quality" value="high" />
        <embed src="contacto.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','librovisitas','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','librovisitas' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="librovisitas.swf" />
        <param name="quality" value="high" />
        <embed src="librovisitas.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer5"> 
  <table width="200" border="0"> 
    <tr> 
      <td><img src="imagenes/cabeceraone.jpg" width="897" height="124" /></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer6"><img src="imagenes/titulocabecera.gif" width="241" height="104" /></div> 
<div id="Layer7"> 
  <table width="229" border="0"> 
    <tr> 
      <td><script language="JavaScript"><!--
 
if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
 
var url="http://www.victorparejo.es/";
var title="Diario de un Compositor";
 
document.write('<A HREF="javascript:window.ext');
document.write('ernal.AddFavorite(url,title);" ');
document.write('onMouseOver=" window.status=');
document.write("'Añade esta web a tus favoritos'; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('"><img src="imagenes/recordarme.gif" width="92" height="92" border="0"> </a>');
}
else {
var msg = "Añadir esta web a favoritos";
if(navigator.appName == "Netscape") msg += "  (CTRL-D)";
document.write(msg);
}
 
// --></script></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer8"> 
  <table width="655" border="0"> 
    <tr> 
      <td><div align="center"> 
        <script language="JavaScript1.1" src="frases.js"> 
    </script> 
    
      &nbsp;</div></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer9"> 
  <div align="center"><img src="imagenes/bettho.gif" width="74" height="95" /></div> 
</div> 
 
<div id="Layer10"><img src="imagenes/nuotti.gif" width="824" height="99" /></div> 
<div id="Layer11"> 
  <table width="228" border="0"> 
    <tr> 
      <td><SCRIPT><!--
dows = new Array("Domingo","Lunes","Martes","Miércoles","Jueves","Viernes","Sábado");
months = new Array("Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre");
now = new Date();
dow = now.getDay();
d = now.getDate();
m = now.getMonth();
h = now.getTime();
y = now.getYear();
document.write(dows[dow]+" "+d+" de "+months[m]+" de "+y);
//--></SCRIPT>&nbsp;</td> 
    </tr> 
  </table> 
  <div id="Layer12" style="position:absolute; left:305px; top:30px; width:470px; height:315px; z-index:2"> 
  <div align="center"> 
    <iframe name="marco" src="presentacion.html" width="550" height="314" border="0" frameborder="0" allowtransparency=""></iframe> 
  </div> 
</div> 
</div> 
<div id="Layer14"> 
  <table width="88" border="0"> 
    <tr> 
      <td><div align="right"><a href="principal.html"><img src="imagenes/espa.gif" width="18" height="10" border="0" /></a></div></td> 
      <td><a href="english.html"><img src="imagenes/english.gif" width="18" height="10" border="0" /></a></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer15"> 
  <table width="124" border="0" cellspacing="0" cellpadding="0"> 
    <tr> 
      <td><div align="center">&nbsp;&nbsp;<img src="imagenes/micro.jpg" width="86" height="78" /></div></td> 
    </tr> 
    <tr> 
      <td height="34"><div align="center"> 
        &nbsp;&nbsp;
<script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0','width','111','height','34','src','grabacion','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','bgcolor','#000000','movie','grabacion' ); //end AC code
</script><noscript> 
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="111" height="34">
  <param name="BGCOLOR" value="#000000" />
  <param name="movie" value="grabacion.swf" />
  <param name="quality" value="high" />
  <embed src="grabacion.swf" width="111" height="34" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" bgcolor="#000000" ></embed>
</object>
</noscript> 
      </div></td> 
    </tr> 
    <tr> 
      <td><div align="center"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="imagenes/pelicula.png" width="73" height="67" />      </div></td> 
    </tr> 
    <tr> 
      <td><div align="center"> 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','93','height','33','src','button2','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','button2' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="93" height="33">
          <param name="movie" value="button2.swf" />
          <param name="quality" value="high" />
          <param name="BGCOLOR" value="#000000" />
          <embed src="button2.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
        </object></noscript> 
      </div></td> 
    </tr> 
    <tr> 
      <td><div align="center">&nbsp;<img src="imagenes/docencia.jpg" alt="" width="67" height="67" /></div></td> 
    </tr> 
    <tr> 
      <td><div align="center"> 
        <script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','93','height','33','src','button1','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','bgcolor','#000000','movie','button1' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="93" height="33">
          <param name="movie" value="button1.swf" />
          <param name="quality" value="high" />
          <param name="BGCOLOR" value="#000000" />
          <embed src="button1.swf" width="93" height="33" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
        </object></noscript> 
      &nbsp;</div> 
      <div id="apDiv1"><a href='#' onclick="javascript:this.style.behavior='url(#default#homepage)';this.setHomePage('http://www.victorparejo.es.com');return false"><img src="imagenes/notaprincipal.gif" width="80" height="80" border="0" /></a></div></td> 
    </tr> 
  </table> 
      <div id="apDiv2"><img src="imagenes/floral2.gif" width="185" height="361" border="0" align="bottom" /></div> 
</div> 
 
</body> 
</html> 
www.victorparejo.es/principalc.html Sigue sin ir como decía con ese código!
Ok, entonces prueba con este:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
<title>Diario de un Compositor</title> 
<link rel="shortcut icon" href="http://www.victorparejo.es/vicpame.ico"> 
 
<style type="text/css"> 
<!--
body,td,th {
	color: #E2E2CF;
	overflow-x: hidden;
	overflow-y: hidden;
}
body {
        margin: 0 auto;
	background-color: #000000;
	background-image: url();
}
#Layer1 {
	position:absolute;
	left:430px;
	top:220px;
	width:422px;
	height:211px;
	z-index:1;
}
#Layer2 {
	position:absolute;
	left:545px;
	top:504px;
	width:406px;
	height:34px;
	z-index:2;
}
a:link {
	color: #E2E2CF;
}
a:visited {
	color: #DDDDD5;
}
#Layer3 {
	position:absolute;
	left:16px;
	top:12px;
	width:278px;
	height:139px;
	z-index:6;
}
#Layer4 {
	position:absolute;
	left:146px;
	top:279px;
	width:111px;
	height:199px;
	z-index:7;
}
#Layer5 {
	position:absolute;
	left:152px;
	top:12px;
	width:570px;
	height:122px;
	z-index:2;
}
#Layer6 {
	position:absolute;
	left:332px;
	top:25px;
	width:181px;
	height:97px;
	z-index:8;
}
#Layer7 {
	position:absolute;
	left:25px;
	top:339px;
	width:224px;
	height:29px;
	z-index:16;
}
#Layer8 {
	position:absolute;
	left:294px;
	top:163px;
	width:653px;
	height:27px;
	z-index:9;
}
#Layer9 {
	position:absolute;
	left:154px;
	top:183px;
	width:93px;
	height:59px;
	z-index:10;
}
#Layer10 {
	position:absolute;
	left:47px;
	top:446px;
	width:794px;
	height:99px;
	z-index:4;
}
#Layer11 {
	position:absolute;
	left:28px;
	top:143px;
	width:239px;
	height:30px;
	z-index:11;
}
#Layer13 {	position:absolute;
	width:523px;
	height:267px;
	z-index:11;
	left: 275px;
	top: 237px;
}
#Layer14 {
	position:absolute;
	width:69px;
	height:17px;
	z-index:15;
	left: 16px;
	top: 182px;
}
#Layer15 {
	position:absolute;
	left:865px;
	top:203px;
	width:118px;
	height:296px;
	z-index:14;
}
#apDiv1 {
	position:absolute;
	width:93px;
	height:65px;
	z-index:15;
	left: -853px;
	top: 30px;
}
#apDiv2 {
	position:absolute;
	width:200px;
	height:115px;
	z-index:13;
	left: -890px;
	top: -22px;
}
#apDiv3 {
	position:absolute;
	width:160px;
	height:26px;
	z-index:18;
	left: 516px;
	top: 501px;
}
#apDiv4 {
	position:absolute;
	width:399px;
	height:21px;
	z-index:19;
	left: 484px;
	top: 531px;
}
-->
</style> 
<script src="Scripts/AC_RunActiveContent.js" type="text/javascript"></script> 
</head> 
 
<body> 
<div id="centrar" style="margin: 0 auto;">
<div id="apDiv4">Es imprescindible pulsar con el rat&oacute;n sobre el bot&oacute;n para entrar</div> 
<div id="Layer16" style="position:absolute; left:449px; top:501px; width:400px; height:39px; z-index:17"> 
  <div align="center"> 
    <table width="98%" border="0"> 
      <tr> 
        <td width="55%" height="25%"><div align="right"> 
            <script language="JavaScript" type="text/javascript"> 
function Comprobar(pal) { 
window.location=pal+".html" 
} 
            </script> 
          </p> 
</div></td> 
        <td width="45%"><div align="center"> 
          <form> 
          <input name="clave" type="password" size="12" /> 
            &nbsp;
<input type="button" name="enviar" value="Entrar" onclick="Comprobar(this.form.clave.value)" /> 
          </form> 
        </div></td> 
      </tr> 
    </table> 
  </div> 
</div> 
<div id="apDiv3"><strong>Zona de Usuarios&nbsp;</strong><strong>&nbsp;&nbsp;<img src="imagenes/munequito.gif" alt="" width="21" height="26" /></strong></div> 
<div id="Layer3"> 
  <table width="280" height="130" border="0"> 
    <tr> 
      <td><div align="center"><img src="imagenes/orquestahueso.jpg" width="200" height="125" /></div></td> 
    </tr> 
  </table> 
</div> 
 
<div id="Layer4"> 
  <table width="110" height="191" border="0"> 
    <tr> 
      <td width="151"><a href="index.html" target="marco"> 
        <script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','presen','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','presen' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
          <param name="movie" value="presen.swf" />
          <param name="quality" value="high" />
          <embed src="presen.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
        </object></noscript> 
      </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','curriculum','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','curriculum' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="curriculum.swf" />
        <param name="quality" value="high" />
        <embed src="curriculum.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','trabajos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','trabajos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="trabajos.swf" />
        <param name="quality" value="high" />
        <embed src="trabajos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','musica','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','musica' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="musica.swf" />
        <param name="quality" value="high" />
        <embed src="musica.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','proyectos','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','proyectos' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="proyectos.swf" />
        <param name="quality" value="high" />
        <embed src="proyectos.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','contacto','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','contacto' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="contacto.swf" />
        <param name="quality" value="high" />
        <embed src="contacto.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
    <tr> 
      <td height="25"><script type="text/javascript"> 
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','100','height','23','src','librovisitas','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','librovisitas' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="100" height="23">
        <param name="movie" value="librovisitas.swf" />
        <param name="quality" value="high" />
        <embed src="librovisitas.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="100" height="23"></embed>
      </object></noscript> 
	  </a></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer5"> 
  <table width="200" border="0"> 
    <tr> 
      <td><img src="imagenes/cabeceraone.jpg" width="897" height="124" /></td> 
    </tr> 
  </table> 
</div> 
<div id="Layer6"><img src="imagenes/titulocabecera.gif" width="241" height="104" /></div> 
<div id="Layer7"> 
  <table width="229" border="0"> 
    <tr> 
      <td><script language="JavaScript"><!--
 
if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
 
var url="http://www.victorparejo.es/";
var title="Diario de un Compositor";
 
document.write('<A HREF="javascript:window.ext');
document.write('ernal.AddFavorite(url,title);" ');
document.write('onMouseOver=" window.status=');
document.write("'Añade esta web a tus favoritos'; return true ");
document.write('"onMouseOut=" window.status=');
document.write("' '; return true ");
document.write('"><img src="imagenes/recordarme.gif" width="92" height="92" border="0"> </a>');
}
else {
var msg = "Añadir esta web a favoritos";
if(navigator.appName == "Netscape") msg += "  (CTRL-D)";
document.write(msg);
}
 
// --></script></td> 
    </tr> 
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No puedes pretender centrarla y decirle a cada capa que tenga una localizacion concreta. Es decir, con position:absolute le dices que se coloque en unas coordenadas concretas, luego, no puedes moverlas hacia el centro de ningún modo. Como puedes decirle a una capa que se coloque en la posición:
position:absolute;
left:430px;
top:220px;
y depués hacer que se centre, que se desplace al centro? O hace caso a una cosa o a la otra, pero para hacer caso a ambas tendria que partirse, que clonarse, o algo así, no crees?

Quizás poniendo coordenadas RELATIVAS en lugar de absolutas, te funcione. Añadir la capa CENTRAR es una buena solución, pero no le estas dejando moverse con esas coordenadas absolutas.

Un abrazo!
Nada, ni con esas. He probado tanto a ponerle 75% como 800px por poner un ejemplo y nada, no varía nada.
Hace un par de horas cambie los absolute por relative y nada. Acabo de probarlo y nada. Las imágenes se mueven de sitio pero libremente.
Sí, sí, si leí que podría ser eso. De hecho lo cambié. Ahora mismo está con la capa CENTRAR y con las posiciones en relative. Y fíjate!
www.victorparejo.es/principalc.html