Cosi dovrebbe andare per entrambi

codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Untitled</title>
<style type="text/css">
<!--
#volo {position:absolute;top:-1000;left:-1000;width:300;background-color:#ffffcc;font-family:verdana;font-size:8pt;border:1px solid blue}
-->
</style>

<script language="JavaScript" type="text/javascript">
<!--
var testo   = "";

function pippo(e) {
 e = e == null ? event : e;
 if (this.title != "") {
  testo           = this.title;
  this.title   = "";
 } // if (this.title != "")
 aDiv            = document.getElementById('volo');
 aDiv.style.left = e.clientX;
 aDiv.style.top  = e.clientY + 10;
 aDiv.innerHTML  = testo;
} // function pippo(anImage)

function pippo2() {
 this.title      = testo;
 aDiv            = document.getElementById('volo'); 
 aDiv.style.left = -1000;
 aDiv.style.top  = -1000; 
 aDiv.innerHTML  = "";
}

//-->
</script>

</head>
<body>
<div id="volo"></div>
[img]image10.jpg[/img]


[img]image11.jpg[/img]

<script language="JavaScript" type="text/javascript">
<!--
document.getElementById("img01").onmousemove = pippo; 
document.getElementById("img01").onmouseout  = pippo2; 
document.getElementById("img02").onmousemove = pippo; 
document.getElementById("img02").onmouseout  = pippo2; 
//-->
</script>
</body>
</html>