function openSubWindow(theURL,winName,width,height) {
		x = (screen.width - width) / 2;
		y = (screen.height - height) / 2; 
  window.open(theURL,winName,"toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,screenX="+x+",screenY="+y+",left="+x+",top="+y+",width="+width+",height="+height);
}
function closeSubWindow() {
	 window.close();
}