function popUp(center,url,winName,width,height,features) {
		if (center) {
			x = (640 - width)/2, y = (480 - height)/2;
			if (screen) {
				y = (screen.availHeight - height)/2;
				x = (screen.availWidth - width)/2;
			}
			if (screen.availWidth > 1800) { 
				x = ((screen.availWidth/2) - width)/2; 
			} 
		}
		var newWin = window.open(url,winName,'scrollbars=no,width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x+','+features);
		newWin.focus();
	}
	
	
	<!-- 
	PBSVideoWindow_X=582; 
	PBSVideoWindow_Y=510; 
//--> 

<!--
		var bName = navigator.appName;
		var bVer = parseInt(navigator.appVersion);
	
		var browser = navigator.appName;
		var ie = "Microsoft Internet Explorer";
		var netscape = "Netscape";
		var os = navigator.platform;
		var mac = 'MacPPC'
	
	function openVideo(video_url,Name, Win) {
	
	if ((bName == "Netscape" && bVer >= 3) || (bName == "Microsoft Internet Explorer" && bVer >= 3)) {
	 
	videowin = window.top.open("","video","height=400,width=582,scrollbars=no,toolbar=no,location=no,resize=no");
	videowin.location.href=video_url;
	if ( videowin.opener == null ) videowin.opener = window.top;
	if (!(bName == "Microsoft Internet Explorer" && bVer == 3)) videowin.focus();
	}
	}
	
//-->