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++) {
			/* If the LI has another menu level */
			if(lis[i].lastChild.tagName=="UL"){
				/* assign the function to the LI */
				lis[i].onmouseover=function() {		
				   /* display the inner menu */
				   this.lastChild.style.display="block";
				}
				lis[i].onmouseout=function() {                       
					this.lastChild.style.display="none";
				}
			}
		}
	}
}

window.onload= function(){
   activateMenu('navdropdown');
}