//<![CDATA[
function popup(url,windowname,width,height,screenX,screenY) {
	width=(width)?width:screen.width/3;
	height=(height)?height:screen.height/3;
//	var screenX = (screen.width/2 - width/2);
//	var screenY = (screen.height/2 - height/2);
	var features= "width=" + width + ",height=" + height;
	features += ",screenX=" + screenX + ",left=" + screenX;
	features += ",screenY=" + screenY  +",top=" + screenY;
	var mywin=window.open(url, windowname, features);
	if (mywin) 
		mywin.focus();
	return mywin;
}

//]]>