si certo

Codice PHP:
<html>
<head>
<title>Prova</title>
<style>
<!--

    
    
.contenitore{
position:absolute;
left:20px;
top:20px;
width:800px;
height: 300px;
background-image: url('img1.jpg');  //cambi qui
padding: 50px;
 }
 
 .piccolo{
position:relative;
width:150px;
height: 80px;
border: 3px solid white;
cursor: hand
 }
 

-->
</style>

<script language="JavaScript1.2">

function Del(){

for(i = 1 ; i < 4; i++)
document.getElementById(i).style.width = "150px";

}

function Cambia(obj){

Del();

obj.style.width = "170px";

var grosso = document.getElementById('0').style ;

if (obj.id == "1" )
grosso.background= "url(img1.jpg)";   //cambi qui
else if (obj.id == "2" )
grosso.background= "url(img2.jpg)";  //cambi qui
else if (obj.id == "3" )
grosso.background= "url(img3.jpg)";  //cambi qui

}


</script>
</head>

<body>



<div id="0" class = "contenitore">

<div id="1" class="piccolo" onmouseover="Cambia(this);" Style="background-image: url('tuaimg1.jpg');"></div>

<div id="2" class="piccolo" onmouseover="Cambia(this);" Style="background-image: url('tuaimg2.jpg');"></div>

<div id="3" class="piccolo" onmouseover="Cambia(this);" Style="background-image: url('tuaimg3.jpg');"></div>

</div>


</body>
</html> 


tuaimg 1 , 2 e 3 son quelle piccole nei rettangolini
ing1 ,2 e 3 quelle che vengono caricatre ne l div grosso


Ciao