non so se ho capito bene ti posto un esempio fatto al volo con dreamweaver.... copialo e dimmi se era quello che volevi:
in pratica se passi sopra il link ciao si apre un immagine di fianco....ovviamente al posto del link ciao puoi mettere l'immagine in miniatura
Codice HTML:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Documento senza titolo</title>
<style type="text/css">
<!--
#Layer1 {
position:absolute;
width:83px;
height:41px;
z-index:1;
}
#Layer2 {
position:absolute;
width:79px;
height:46px;
z-index:2;
left: 155px;
top: 29px;
}
-->
</style>
<script type="text/JavaScript">
<!--
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;
}
function MM_showHideLayers() { //v6.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
obj.visibility=v; }
}
//-->
</script>
</head>
<body onload="MM_showHideLayers('Layer2','','hide')">
<div id="Layer1" onmouseover="MM_showHideLayers('Layer2','','show')" onmouseout="MM_showHideLayers('Layer2','','hide')"><a href="#">ciao</a></div>
<div id="Layer2"><img src="http://www.cristianolovatelliravarinonews.com/articoli/farioli/Gianfarioli.City%20CAR%201971.jpg"/></div>
</body>
</html>