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, xOffset, yOffset) {
	if(xOffset==undefined) {
		xOffset = 0;
	}
	if(yOffset==undefined) {
		yOffset = 0;
	}
	var x = document.getElementById(aa);
	var tt = findPosX(x) + xOffset;
	var ww = findPosY(x) + yOffset;
	if (timeOn !== null) {
		clearTimeout(timeOn);
		hideLayer(onLayer);
	}
	if (IE4) {
		var layers = eval("document.all[\"" + layerName + "\"].style");
		layers.left = tt;
		layers.top = ww;
		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";
				elementRef.style.left = tt;
				elementRef.style.top = ww;
			}
		}
	}
	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()", 200);
}

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 
	itemName.style.color = ocolor;
	clearTimeout(timeOn);
	menuActive = 1;
}

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

function findPosX(obj) {
	var curleft = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curleft += obj.offsetLeft;
			obj = obj.offsetParent;
		}
	} else {
		if (obj.x) {
			curleft += obj.x;
		}
	}
	return curleft;
}

function findPosY(obj) {
	var curtop = 0;
	if (obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop;
			obj = obj.offsetParent;
		}
	} else {
		if (obj.y) {
			curtop += obj.y;
		}
	}
	return curtop;
}