var showingLayer = '';
var jTime = 0;
var nn4 = (document.layers);
var ie = (document.all);
var nn6 = (!document.all && document.getElementById);

function hideMenu()
{
	if (showingLayer) {
		if (ie||nn6) {
			showingLayer.style.visibility='hidden';
			} 
		if (nn4) {
			showingLayer.visibility='hidden';
		}
	}
	showingLayer = 0;
}

function leaveMenu()
{
	clearTimeout(jTime);
	jTime = window.setTimeout('hideMenu()',500);
}


function showMenu(showlayername)
{
	clearTimeout(jTime);
	if (ie) {
		var layers = document.all.tags("DIV");
		for (var i=0; i<layers.length; i++) {	
			if (layers[i].id == showlayername)
				{
				if (showingLayer != layers[i]) 
					{ 
						hideMenu(); 
						showingLayer = layers[i];
						showingLayer.style.visibility='visible';
					}
				} 
			}
		}

	if (nn6) {
		var layers = document.body.getElementsByTagName("DIV");
		for (var i=0; i<layers.length; i++) {	
			if (layers[i].id == showlayername)
				{
				if (showingLayer != layers[i]) 
					{ 
						hideMenu(); 
						showingLayer = layers[i];
						showingLayer.style.visibility='visible';
					}
				} 
			}
		}

	if (nn4) {
		var layers = document.all.tags("DIV");
		for (var i=0; i<layers.length; i++) {	
			if (layers[i].id == showlayername)
				{
				if (showingLayer != layers[i]) 
					{ 
						hideMenu(); 
						showingLayer = layers[i];
						showingLayer.visibility='visible';
					}
				} 
			}
		}
}