a tag que contém o MENU tem que ser DIV e a que vai conter o IFRAME tem que ser SPAM
copia esse código e cola no teu dreamweaver.. veja vc mesmo!
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script language="JavaScript" type="text/JavaScript">
<!--
function MM_reloadPage(init) { //reloads the window if Nav4 resized
if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_showHideLayers() { //v6.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
obj.visibility=v; }
}
//-->
</script>
</head>
<body>
<table width="614" border="0" cellpadding="0" cellspacing="0">
<!--DWLayoutTable-->
<tr>
<td width="614" height="48" valign="top"><div id="Layer1" style="position:absolute; width:200px; height:115px; z-index:2; left: 196px; top: 29px; background-color: #0000FF; layer-background-color: #0000FF; border: 1px none #000000; visibility: hidden;"></div>
<a href="#" onMouseOver="MM_showHideLayers('Layer1','','show')" onMouseOut="MM_showHideLayers('Layer1','','hide')">gegegeg</a></td>
</tr>
<tr>
<td height="32"> </td>
</tr>
<tr>
<td height="228" valign="top"><span id="iframeLayer" style="position:absolute; width:611px; height:228px; z-index:1; left: 11px;">
<iframe src="http://www.terra.com.br" frameborder="0" width="100%" height="100%" marginheight="0" marginwidth="0" hspace="0" vspace="0"></iframe></span></td>
</tr>
</table>
</body>
</html>
