function browcheck() { 
	this.version = navigator.appVersion;
	this.agent = navigator.userAgent;
	this.dom = (document.getElementById) ? 1 : 0;
	this.opera5 = ((navigator.userAgent.indexOf("Opera") > -1) && (document.getElementById)) ? 1 : 0;
	this.ie5 = (this.version.indexOf("MSIE 5") > -1 && this.dom && !this.opera5) ? 1 : 0;
	this.ie6 = (this.version.indexOf("MSIE 6") > -1 && this.dom && !this.opera5) ? 1 : 0;
	this.ie4 = (document.all && !this.dom && !this.opera5) ? 1 : 0;
	this.ie = (this.ie4 || this.ie5 || this.ie6);
	this.mac = this.agent.indexOf("Mac") > -1;
	this.ns6 = (this.dom && parseInt(this.version) >= 5) ? 1 : 0; 
	this.ns4 = ((document.layers) && (!this.dom)) ? 1 : 0;
	this.ns7 = (navigator.userAgent.toLowerCase().indexOf("netscape/7") > -1) ? 1 : 0;
	this.ns = (this.ns4 || this.ns6 || this.ns7);
	this.brow = (this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5);
	return this;
	}
	function preload(imgObj,imgSrc) {
		eval(imgObj+' = new Image()')
		eval(imgObj+'.src = "'+imgSrc+'"')
	}
	var brwsr = browcheck();
	
	function popWin(theURL,winWidth,winHeight,showLocation,showMenu,scrollWin,resizeWin) {
		var winX = (screen.width - winWidth) / 2;
		var winY = (screen.height - winHeight) / 2;
		windowAttributes= ('width=' + winWidth + ',height=' + winHeight + 'location=' + 'showLocation' + ',menubar=' + showMenu + ',scrollbars=' + scrollWin + ",resizable=" + resizeWin + ",left=" + winX + ",top=" + winY);
		window.open(theURL, "", windowAttributes);
	}