function PopupWindow(v_href,w,h)
{
  var v_name, v_value, win;
  v_name  = "Popup";
  vx      = (screen.width / 2) - ( w / 2 );
  vx      = 30;
  vy      = (screen.height / 2) - ( h / 2);
  vy      = 50;
  vx1     = screen.width - vx;
  vy1     = screen.height - vy;
  v_value = "width=" + w + ",height=" + h + ",left=" + vx + ",top=" + vy + ",resizable=no";
  win=window.open(v_href,v_name,v_value);
  win.focus();
}