// Launches a popup window, centered in the screen. Width and Height will be passed via javscript
function popUp(win, w, h){
	var cl = (screen.width-w)/2;
	var ct = (screen.height-h)/2;
		
	newWindow = window.open(win,'PopUp','toolbar=no,location=no,status=yes,scrollbars=yes,resizable=no,width='+w+',height='+h+',left='+cl+',top='+ct);
	newWindow.focus();
	
}