function WdAddFirstItem(){

		var li = $E('.topmenu #mainlevel-nav li');
		if(li) li.addClass('firstitem');
		
		var lis = document.getElementById("mainlevel-nav").getElementsByTagName("LI");
		if(!lis) return ;
		else 
			var last = lis.length -1;
		lis[last].className+=" lastitem";

	}
window.addEvent ('load', function() {
	WdAddFirstItem()
});

function agregar(){
   if ((navigator.appName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion)>=4)) {
      var url="http://www.mixconsolas.com/";
      var titulo="MixConsolas - Todo sobre tus consolas";
      window.external.AddFavorite(url,titulo);
   }
   else {
      if(navigator.appName == "Netscape")
         alert ("Presiona Ctrl+D para agregar este sitio a Marcadores");
   }
}


<!--
if (parent.frames.length > 0) top.location.replace(document.location); //-->

var cssmenuids=["cssmenu1"] //Enter id(s) of CSS Horizontal UL menus, separated by commas
var csssubmenuoffset=-1 //Offset of submenus from main menu. Default is 0 pixels.

function createcssmenu2(){
for (var i=0; i<cssmenuids.length; i++){
  var ultags=document.getElementById(cssmenuids[i]).getElementsByTagName("ul")
    for (var t=0; t<ultags.length; t++){
			ultags[t].style.top=ultags[t].parentNode.offsetHeight+csssubmenuoffset+"px"
    	var spanref=document.createElement("span")
			spanref.className="arrowdiv"
			spanref.innerHTML="&nbsp;&nbsp;&nbsp;&nbsp;"
			ultags[t].parentNode.getElementsByTagName("a")[0].appendChild(spanref)
    	ultags[t].parentNode.onmouseover=function(){
					this.style.zIndex=100
    	this.getElementsByTagName("ul")[0].style.visibility="visible"
					this.getElementsByTagName("ul")[0].style.zIndex=0
    	}
    	ultags[t].parentNode.onmouseout=function(){
					this.style.zIndex=0
					this.getElementsByTagName("ul")[0].style.visibility="hidden"
					this.getElementsByTagName("ul")[0].style.zIndex=100
    	}
    }
  }
}

if (window.addEventListener)
window.addEventListener("load", createcssmenu2, false)
else if (window.attachEvent)
window.attachEvent("onload", createcssmenu2)