| Espero te sirva este codigo
<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')?'':(v=='hide')?'none':v; }
obj.display=v; }
}
//-->
</script>
</head>
<body>
<div><font face="Arial, Helvetica, sans-serif"><strong><a href="#"><img src="carpeta.gif" alt="" width="32" height="32" border="0"></a><a href="#" onClick="MM_showHideLayers('menu11','','show','men u12','','show','menu21','','hide','menu22','','hid e','menu31','','hide','menu32','','hide')">Menu1</a></strong></font></div>
<div id="menu11" style="display:none"> <font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
<div id="menu12" style="display:none"><font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
<div><strong><font face="Arial, Helvetica, sans-serif"><strong><a href="#"><img src="carpeta.gif" alt="" width="32" height="32" border="0"></a></strong><a href="#" onClick="MM_showHideLayers('menu11','','hide','men u12','','hide','menu21','','show','menu22','','sho w','menu31','','hide','menu32','','hide')">OtraSec cion</a></font></strong>
</div>
<div id="menu21" style="display:none"><font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
<div id="menu22" style="display:none"><font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
<div><strong><font face="Arial, Helvetica, sans-serif"><strong><a href="#"><img src="carpeta.gif" alt="" width="32" height="32" border="0"></a></strong><a href="#" onClick="MM_showHideLayers('menu11','','hide','men u12','','hide','menu21','','hide','menu22','','hid e','menu31','','show','menu32','','show')">Mas
Secciones </a></font></strong></div>
<div id="menu31" style="display:none"><font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
<div id="menu32" style="display:none"><font size="2" face="Arial, Helvetica, sans-serif">Seccion</font></div>
</body>
</html> |