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

if (window.attachEvent)
    window.attachEvent("onload", startList)
else
    window.onload=startList;