window.onerror = null;
var bName = navigator.appName;
var bVer = parseInt(navigator.appVersion);
var IE4 = (bName == "Microsoft Internet Explorer" && bVer >= 4);
var menuActive = 0;
var menuOn = 0;
var onLayer;
var timeOn = null;

function showLayer(layerName,aa){
var x =document.getElementById(aa);

if (timeOn != null) {
clearTimeout(timeOn);
hideLayer(onLayer);
}
if (IE4) {
var layers = eval('document.all["'+layerName+'"].style');

eval('document.all["'+layerName+'"].style.visibility="visible"');
}
else {
if(document.getElementById){
var elementRef = document.getElementById(layerName);
if((elementRef.style)&& (elementRef.style.visibility!=null)){
elementRef.style.visibility = 'visible';
}
}
}
onLayer = layerName
}

function hideLayer(layerName){
if (menuActive == 0)
{
if (IE4){
eval('document.all["'+layerName+'"].style.visibility="hidden"');
}
else{
if(document.getElementById){
var elementRef = document.getElementById(layerName);
if((elementRef.style)&& (elementRef.style.visibility!=null)){
elementRef.style.visibility = 'hidden';
}
}
}
}
}

function btnTimer() {
timeOn = setTimeout("btnOut()",600)
}

function btnOut(layerName){
if (menuActive == 0){
hideLayer(onLayer)
}
}

var item;
function menuOver(itemName,ocolor){
item=itemName;
itemName.style.backgroundColor = ocolor; //background color change on mouse over
clearTimeout(timeOn);
menuActive = 1
}

function menuOut(itemName,ocolor){
if(item)
itemName.style.backgroundColor = ocolor;
menuActive = 0
timeOn = setTimeout("hideLayer(onLayer)", 100)
}