Ca peut peut-être t'aider
<html>
<head>
<script>
var visibleDivId = "";
function display(_id){
if(visibleDivId != ""){
document.getElementById(visibleDivId).style.visibility = "hidden";
}
document.getElementById(_id).style.visibility = "visible";
visibleDivId = _id;
}
</script>
</head>
<body>
<img id="img1" src="test.gif" width="100" height="100" onmouseover="display('div1')">
<img id="img2" src="test.gif" width="100" height="100" onmouseover="display('div2')">
<div style="position:relative">
<div id="div1" style="visibility:hidden;position:absolute;top:0">
My first div content
</div>
<div id="div2" style="visibility:hidden;position:absolute;top:0">
My second div content
</div>
</div>
</body>
</html>