var gotIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var gotNS = (navigator.appName == 'Netscape') ? true : false;
var ns=document.layers;
var ie=document.all;
var ns6=document.getElementById&&!document.all;

function popWin( url, name, width, height, scroller ) {

	if (gotIE) {
	var left = (screen.Width/2) - width/2;
	var top = (screen.Height/2) - height/2;
	} else if (gotNS) {
	var left = (screen.availWidth/2) - width/2;
	var top = (screen.availHeight/2) - height/2;
	} else {
	var left = (screen.Width/2) - width/2;
	var top = (screen.Height/2) - height/2;
	}

var outStr = 'left='+left+',top='+top+',height=' + height + ',width=' + width;

	if (scroller == true) {
		 outStr = outStr + ',menubar=no,toolbar=no,location=no,directories=no,status=yes,scrollbars=1,resizable=no';
	 } else {
		 outStr = outStr + ',menubar=no,toolbar=no,location=no,directories=no,status=yes,scrollbars=no,resizable=no';
	 }

window.open(url, name, outStr);

}