var dd_ns4 = (document.layers) ? 1 : 0;
var dd_ie4 = (document.all) ? 1 : 0;
var dd_dom = ((document.getElementById) && (!dd_ie4)) ? 1 : 0; // ns6
var isOver = false;
var timer = null;
var cmTop = 0;
var cmLeft = 0; 


function ShowLayer(showEl,event) {
	if (showEl == "mnuhome") return;
	clearTimeout(timer);
	HideAllLayers();
	if (dd_dom) {
		var whichEl = document.getElementById(showEl);
	}
	else {	
		var whichEl = (dd_ns4) ? document.layers[showEl] : document.all[showEl].style;
	}
	whichAnchor = showEl + "A";
	if (dd_ie4) {
		if (document.all[whichAnchor]){ 
			cmTop = findy(document.all[whichAnchor]) + 20;
			cmLeft = findx(document.all[whichAnchor]) - 20;
		}
	}
	if (dd_ns4) {
		if (document.anchors[whichAnchor]) {
			cmTop = document.anchors[whichAnchor].y + 20;
			cmLeft = document.anchors[whichAnchor].x - 20;
		}
	}
	if (dd_dom){
		if (document.anchors[whichAnchor]){
			var myObject = document.anchors[whichAnchor];
			while (myObject.offsetParent) {
				cmTop  = cmTop  + myObject.offsetTop;
				cmLeft = cmLeft + myObject.offsetLeft;
				myObject = myObject.offsetParent
			}
		}
	}
	if (dd_dom) {
		whichEl.style.visibility = "visible";
		whichEl.style.top = cmTop + 20;
		whichEl.style.left = cmLeft;		
	}
	else {	
		whichEl.visibility = "visible";
		whichEl.top = cmTop;
		whichEl.left = cmLeft;
	} 	
	cmTop = 0; cmLeft = 0;
}



function findy(item) {
	if (item.offsetParent) {
		return item.offsetTop + findy(item.offsetParent);
	}
	else {
		return item.offsetTop;
	}
}

function findx(item) {
	if (item.offsetParent) {
		return item.offsetLeft + findx(item.offsetParent);
	}
	else {
		return item.offsetLeft;
	}
}

function HideAllLayers() {
	if (dd_dom) {
		var divTemp = document.getElementsByTagName('div');
		for (i = 0; i < divTemp.length; i++) { 
			var divString = new String(divTemp[i].id);
			if (divString.indexOf('mnu') != -1) divTemp[i].style.visibility = "hidden";
		}
	}	
	if (dd_ie4) {
		var divTemp = document.all.tags("div");
		for (i = 0; i < divTemp.length; i++) { 
			var divString = new String(divTemp[i].id);
			if (divString.indexOf('mnu') != -1) divTemp[i].style.visibility = "hidden";
		}
	}
	if (dd_ns4) {
		for (i = 0; i < document.layers.length; i++) { 
			var divString = new String(document.layers[i].name);
			if (divString.indexOf('mnu') != -1) document.layers[i].visibility = "hidden";
		}
	}
}


function OverLayer() { clearTimeout(timer); isOver = true; }

function OutLayer() { 
	clearTimeout(timer);
	isOver = false; 
	timer = setTimeout("HideAllLayers()",300);
}

function toggleLayer(whichLayer)
{
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"block";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
}

function newWindow(bookgif) {
	bookWindow = window.open(bookgif, "bookWin", "width=550,height=710,scrollbars=yes") 
	bookWindow.focus()
}