activateMenu = function(nav) {
	/* currentStyle restricts the Javascript to IE only */
	if (document.all && document.getElementById(nav).currentStyle) {  
		var navroot = document.getElementById(nav);
        
		/* Get all the list items within the menu */
		var lis=navroot.getElementsByTagName("LI");  
		for (i=0; i<lis.length; i++) {
        
			/* assign the function to the LI */
			lis[i].onmouseover=function() {	
			/* display the inner menu */
				this.className+=" hover";
			}

			lis[i].onmouseout=function() {                       
				this.className=this.className.replace(new RegExp(" hover\\b"), "");
			}
		}
		
	}
}

window.onload= function(){
	/* pass the function the id of the top level UL */
	/* remove one, when only using one menu */
	activateMenu('main'); 
	// activateMenu('vertnav'); 
}