Il codice in sè usato per fare quella parte della pagina va bene, evidentemente c'è qualcos'altro che lo infastidisce...
Se crei una pagina con solo la parte di codice incriminato, potrai verificare che funziona
<HTML>
<HEAD>
<TITLE>Genoa Cricket and Football Club</TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<script language="JavaScript">
<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
window.open(theURL,winName,features);
}
//-->
</script>
</HEAD>
<BODY>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="96"><img src="http://www.genoacfc.it/img/base_partita1.gif" width="96" height="28"></td>
<td background="http://www.genoacfc.it/img/base_partita3.gif"> </td>
<td width="245"><img src="http://www.genoacfc.it/img/base_partita2.gif" width="350" height="28" border="0" usemap="#Map9"></td>
</tr>
</table>
<map name="Map9">
<area shape="rect" coords="272,4,343,24" href="#" alt="Cronaca" onClick="MM_openBrWindow('cronaca_new.asp','','scrollbars=yes,width=590,height=500')">
<area shape="rect" coords="29,2,91,23" href="foto-gallery.asp" alt="Galleria fotografica">
<area shape="rect" coords="96,3,180,22" href="classifica.asp" alt="Calendario">
<area shape="rect" coords="183,4,269,23" href="classifica.asp" alt="Classifica">
</map>
<map name="Map10"><area shape="rect" coords="272,4,343,24" href="#" alt="Cronaca" onClick="MM_openBrWindow('cronaca_new.asp','','scrollbars=yes,width=590,height=500')">
<area shape="rect" coords="184,3,271,23" href="classifica.asp">
<area shape="rect" coords="95,3,178,23" href="classifica.asp" alt="Calendario">
<area shape="rect" coords="36,4,92,23" href="foto-gallery.asp" alt="Galleria fotografica">
</map>
</body>
</html>