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";
                    var ieUL = this.getElementsByTagName('ul')[0];
                    if (ieUL){
                        var ieMat = document.createElement('iframe');
                        ieMat.style.width=ieUL.offsetWidth+"px";
                        ieMat.style.height=ieUL.offsetHeight+"px";
                        ieMat.style.position='absolute';
                        this.insertBefore(ieMat,ieUL);
                    }
                }
                node.onmouseout=function() {
                    this.className=this.className.replace(" over", "");
                    var ifr = this.getElementsByTagName('iframe')[0];
                    if (ifr) ifr.removeNode();
                }
            }
        }
    }
}
if ((navigator.userAgent.indexOf('MSIE') >= 0) && (navigator.userAgent.indexOf('Opera') == -1)){
    window.onload=startList;
}