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;