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;