//onLoad="javascript:ultimatePU('xxx.html','XXX','center','center','400', '400','no');"
var newwin;
function ultimatePU(winurl,winname,xPos,yPos,width,height,scrollb)
{
var xMax = screen.width, yMax = screen.height;
var features =
        'width='        + width +
        ',height='      + height +
        ',scrollbars='  + scrollb;
		
if (xPos=='center') {
		var xOffset = (xMax - width)/2;
		features = features +',screenX='+xOffset+',left='+xOffset+'';
		} else {
		features = features +',screenX='+xPos+',left='+xPos+'';
		}
if (yPos=='center') {
		var yOffset = (yMax - height)/2;
		features = features +',screenY='+yOffset+',top='+yOffset+'';
		} else {
		features = features +',screenY='+yPos+',top='+yPos+'';
		}
newwin = window.open(winurl,winname,features);
setTimeout('newwin.focus();',250);	
}