function open_popup(popup_URL,popup_id,sWidth,sHeight)
{
	var popup_win;
	popup_win = null;

	popup_win=window.open(popup_URL,popup_id,"toolbar=no,menubar=0,location=0,width=" + sWidth +",height=" + sHeight +",directories=0,status=0,scrollbars=0,resize=0,copyhistory=0,screenx=0,screeny=0,left=0,top=0");

	if (popup_win != null)
	{
		if (popup_win.opener == null)
		{
			popup_win.opener = self;
		}
	}
	popup_win.focus();
}