function openpopup(loc, title, w, h, bars) {
	
	var x = (screen.width - w)/2;
	var y = (screen.height - h)/2;

//	var x = 100;
//	var y = 100;
	
	var s = ((bars) ? "scrollbars," : "") + "width=" + w + ",height=" + h + ",left=" + x + ",top=" + y;

	var w = window.open(loc, title, s);
	w.focus();

}