|  Respuesta: Problema con posicionamiento absoluto en DW CS2  
  He creado el evento a:hover que me faltaba pero sigue sin funcionarme.
 Mira te paso un ejemplo de lo q busco exactamente:
 
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>Documento sin título</title>
 <link href="estilos css ciudades.css" rel="stylesheet" type="text/css">
 <script type="text/javascript">
 <!--
 function MM_changeProp(objId,x,theProp,theValue) { //v9.0
 var obj = null; with (document){ if (getElementById)
 obj = getElementById(objId); }
 if (obj){
 if (theValue == true || theValue == false)
 eval("obj.style."+theProp+"="+theValue);
 else eval("obj.style."+theProp+"='"+theValue+"'");
 }
 }
 
 function MM_findObj(n, d) { //v4.01
 var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
 d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
 if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
 for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
 if(!x && d.getElementById) x=d.getElementById(n); return x;
 }
 //-->
 </script>
 </head>
 
 <body>
 <div class="contenedor">
 <div class="encabezado"><span class="h2">Ejercicio de comportamientos con Divs</span>
 <span class="h1">Elige tu ciudad favorita!</span></div>
 <div class="navegador"><a href="#" onMouseOver="MM_changeProp('paris','','visibility'  ,'visible','DIV')" onMouseOut="MM_changeProp('paris','','visibility',  'hidden','DIV')">Paris</a> <a href="#" onMouseOver="MM_changeProp('amsterdan','','visibil  ity','visible','DIV')" onMouseOut="MM_changeProp('amsterdan','','visibili  ty','hidden','DIV')">Amsterdan</a> <a href="#" onMouseOver="MM_changeProp('london','','visibility  ','visible','DIV')" onMouseOut="MM_changeProp('london','','visibility'  ,'hidden','DIV')">London</a> <a href="#" onMouseOver="MM_changeProp('bruselas','','visibili  ty','visible','DIV')" onMouseOut="MM_changeProp('bruselas','','visibilit  y','hidden','DIV')">Bruselas</a> <a href="#" onMouseOver="MM_changeProp('moscu','','visibility'  ,'visible','DIV')" onMouseOut="MM_changeProp('moscu','','visibility',  'hidden','DIV')">Moscu</a></div>
 
 <div class="paris" id="paris"></div>
 
 <div class="amsterdan" id="amsterdan"></div>
 
 <div class="london" id="london"></div>
 
 <div class="bruselas" id="bruselas"></div>
 
 <div class="moscu" id="moscu"></div>
 </div>
 </body>
 </html>
 
 Y la hoja estilos CSS:
 
 @charset "utf-8";
 body {
 text-align: center;
 margin: 0px;
 padding: 0px;
 }
 a {
 color: #333333;
 text-decoration: none;
 }
 a:hover {
 color: #FFFFFF;
 background-color: #FF0000;
 }
 
 .contenedor {
 width: 500px;
 margin-right: auto;
 margin-left: auto;
 border: 1px solid #000000;
 padding: 5px;
 height: 300px;
 text-align: left;
 }
 .paris {
 font-family: Arial, Helvetica, sans-serif;
 background-image: url(imagenes/7dep_paris.jpg);
 height: 200px;
 width: 200px;
 margin-top: 5px;
 position: absolute;
 visibility: hidden;
 }
 
 
 .navegador {
 font-family: Arial, Helvetica, sans-serif;
 font-size: 14px;
 color: #333333;
 text-align: left;
 height: auto;
 }
 .encabezado {
 font-family: Arial, Helvetica, sans-serif;
 text-align: left;
 border-top-width: 3px;
 border-right-width: 3px;
 border-bottom-width: 3px;
 border-left-width: 3px;
 border-bottom-style: solid;
 border-bottom-color: #FF0000;
 height: 40px;
 }
 .h2 {
 font-family: Arial, Helvetica, sans-serif;
 font-size: 12px;
 color: #333333;
 text-align: right;
 float: right;
 line-height: 30px;
 }
 .h1 {
 font-family: Arial, Helvetica, sans-serif;
 font-size: 18px;
 line-height: 30px;
 color: #000000;
 text-align: left;
 }
 .amsterdan {
 font-family: Arial, Helvetica, sans-serif;
 background-image: url(imagenes/amsterdan.jpg);
 height: 200px;
 width: 200px;
 margin-top: 5px;
 position: absolute;
 visibility: hidden;
 }
 .london {
 font-family: Arial, Helvetica, sans-serif;
 background-image: url(imagenes/london.jpg);
 height: 200px;
 width: 200px;
 margin-top: 5px;
 position: absolute;
 visibility: hidden;
 }
 .bruselas {
 font-family: Arial, Helvetica, sans-serif;
 background-image: url(imagenes/Bruselas-Grand-Place.jpg);
 height: 200px;
 width: 200px;
 margin-top: 5px;
 position: absolute;
 visibility: hidden;
 }
 .moscu {
 font-family: Arial, Helvetica, sans-serif;
 background-image: url(imagenes/Moscu.jpg);
 height: 200px;
 width: 200px;
 margin-top: 5px;
 position: absolute;
 visibility: hidden;
 }
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