startList = function() {

   if (document.all&&document.getElementById) {
   
	  navRoot = document.getElementById("mainMenu");
	  
	  for (i=0; i<navRoot.childNodes.length; i++) {
	  
		 node = navRoot.childNodes[i];
		 
		 if (node.nodeName=="LI") {
		 
			node.onmouseover=function() {
			
			   this.className+=" over";
			}
			
			node.onmouseout=function() {
			
			   this.className=this.className.replace(" over", "");
			   
			}
			
		 }
		 
	  }
	  
   }
   
}

window.onload=startList;