var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;
var needhide=new Array(100)


function hidelayer(lay) {
if (ie4&&document.all[lay]) {document.all[lay].style.visibility = "hidden";}
if (ns4&&document.layers[lay]) {document.layers[lay].visibility = "hide";}
if (ns6&&document.getElementById([lay])) {document.getElementById([lay]).style.display = "none";}
}

function hidelayer2(lay) {
setTimeout('hidelayer("'+lay+'")',500);
}

function showlayer2(lay,t) {
needhide[t]=false
showlayer(lay)
}

function showlayer(lay) {
if (ie4&&document.all[lay]) {document.all[lay].style.visibility = "visible";}
if (ns4&&document.layers[lay]) {document.layers[lay].visibility = "show";}
if (ns6&&document.getElementById([lay])) {document.getElementById([lay]).style.display = "block";}
}

function hideall() {
 for(i=0;i<20;i++){
  tlay='submenu'+i
  hidelayer(tlay)
 }
}