startList = function() { 
    if (document.all && document.getElementById) { 
        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;