// JavaScript Document

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 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];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_submit_over = newImage("images/nav-submit-over.gif");
		nav_browse_over = newImage("images/nav-browse-over.gif");
		nav_tell_over = newImage("images/nav-tell-over.gif");
		preloadFlag = true;
	}
}

var opendoPopup = null; 

function shutPoster() {
	if (openPoster != null && openPoster.open) openPoster.close();
} 

function shutcenterPoster() {
	if (opencenterPoster != null && opencenterPoster.open) opencenterPoster.close();
} 

var chasm = screen.availWidth;
var mount = screen.availHeight;

var w = 0;
var h = 0;

function doPopup(URL,WinName,w,h) { 
	opendoPopup = window.open(URL, WinName, ',titlebar=yes,menubar=no,toolbar=no,location=no,directories=no,status=yes,scrollbars=yes,resizable=yes,width=' + (w + 20) + ',height=' + (h + 20) + ',left=' + 20 + ',top=' + 20);
}