// popup window code
var IE = navigator.appVersion.indexOf("MSIE")>0;
var msieIndex = navigator.appVersion.indexOf("MSIE") + 5;
var version = parseFloat(navigator.appVersion.substr(msieIndex,3))
var IE4 = IE && version>=4 && version<5;
var IE5 = IE && version>=5;
var Macintosh = navigator.userAgent.indexOf('Mac')>0;

function spawn(URL,windowName,width,height) {
	// default amounts in case they are running an old browser
	var w = 800;
	var h = 600;
	if (document.all || document.layers || document.getElementById) {
	   w = screen.availWidth;
	   h = screen.availHeight;
	}
	var leftPos = (w-width)/2, topPos = (h-height)/2;
	if (Macintosh) {
		if (IE4) { newheight = 17 + height; }
		else { newheight = height; }
	}
	else { newheight = height; }
	var msgWindow = window.open(URL, windowName, "scrollbars=auto,toolbar=no,location=no,status=yes,menubar=no,top=0,left=0,width="+width+",height="+newheight+",resizable=yes,top="+topPos+",left="+leftPos );
}