var menu;
var menuTimeOut;
var currentMenu='nav-01-roll';
var preloadFlag = false;
userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}


function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function setIdProperty(id,property,value) {
	var styleObject = document.getElementById( id );
	if (styleObject != null) {
		styleObject = styleObject.style;
		styleObject[ property ] = value;
	}
}	
	
	
function hideLayer(id) {
	if (document.getElementById) {
		setIdProperty(id,"visibility","hidden");
	}
	else {
		if (document.layers) { document.layers[id].visibility = "hide"; }
		else { document.all[id].style.visibility = "hidden"; }
	}
}

function showLayer(id) {
	if (document.getElementById) {
		setIdProperty(id,"visibility","visible");
	}
	else {
		if (document.layers) { document.layers[id].visibility = "show"; }
		else { document.all[id].style.visibility = "visible"; }
	}
}
	

function clearMenu() {
	menuTimeOut=setTimeout("hideLayer(currentMenu);clearMenuTitle()",1000);
}
	

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}