Ecco un codice funzionante.
Adattalo a tuo piacimento.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script language="JavaScript" type="text/JavaScript">
<!--
function MM_goToURL() { //v3.0
var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
for (i=0; i<(args.length-1); i+=2) eval(args*+".location='"+args[i+1]+"'");
}
//-->
</script>
</head>
<body>
<table onmouseover="MM_goToURL('parent','http://www.google.it/');return document.MM_returnValue" width=100% border=1 cellpadding=4 cellspacing=3 style="page-break-before: always">
<col width=256*>
<tr>
<td width=100% valign=TOP><h1 align=CENTER>prova</h1></td>
</tr>
</table>
</body>
</html>
Sposto nella sezione script.
Ciao