var NS6=(document.getElementById&&!document.all);
var IE=(document.all);
var IE4=(document.all&&!document.getElementById);
var NS=(navigator.appName=="Netscape" && navigator.appVersion.charAt(0)=="4");
var OP=(navigator.userAgent.indexOf('Opera')>-1);

var img_C = newImage('/images/Check_train.gif');
var img_W = newImage('/images/Cross_train.gif');
var img_PQ = newImage('/images/b_arrow.gif');
var img_Blank = newImage('/images/blank.gif');

var userAgent = window.navigator.userAgent;
var browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
var mustInitImg = true;

function newImage(arg) 
{
	if (document.images) 
	{
		var rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function initImgID() 
{
	di = document.images;
	if (mustInitImg && di) { 
		for (var i=0; i < di.length; i++) { 
			if (!di[i].id) di[i].id=di[i].name; 
		}
			mustInitImg = false;
	}
}

function findElement(n,ly) {
	d = document;
	if (browserVers < 4)		return d[n];
	if ((browserVers >= 6) && (d.getElementById)) {initImgID; return(d.getElementById(n))}; 
	var cd = ly ? ly.document : d;
	var elem = cd[n];
	if (!elem) {
		for (var i=0; i < cd.layers.length;i++) {
			elem = findElement(n,cd.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}