var openwindow;

  function show_big_image_bl(img_id)
  {
    openwindow = window.open("/big_image.php?"+ img_id, "page", "width=400,height=400,left=100,top=100,screenX=100,screenY=100,toolbar=no,location=no,menubar=no,scrollbars=no,resizeable=no,status=no");
    openwindow.focus();
  }

  function show_big_image_sl(img_id)
  {
    openwindow = window.open("/big_image.php?"+ img_id, "page", "width=400,height=400,left=100,top=100,screenX=100,screenY=100,toolbar=no,location=no,menubar=no,scrollbars=no,resizeable=no,status=no");
    openwindow.focus();
  }

  function resize_window(size_x, size_y)
  {
    window.resizeTo(size_x, size_y);
  }