startList = function() 
           {
                         
               navRoot = document.getElementById("nav");
               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;