over = function() {
	var sfEls = document.getElementById("nav").
getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" over";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.
replace(new RegExp(" over\\b"), "");
		}
	}
}
window.onload= function(nav){
    activaMenu('nav');
}
activaMenu = function(pad) {
	if (document.all && document.getElementById(pad).currentStyle) {
        var navroot = document.getElementById(pad);
        var lis=navroot.getElementsByTagName("LI");
        for (i=0; i<lis.length; i++) {
            if(lis[i].lastChild.tagName=="UL"){
             	lis[i].onmouseover=function(pad) {
                   this.lastChild.style.display="block";
                }
                lis[i].onmouseout=function(pad) {                       
                   this.lastChild.style.display="none";
                }
            }
        }
    }
}
window.onload= function(pad){
    activaMenu('pad');
}