function emgr_open_window(type, file, title, width, height) {
  if (type == "graphic") {
    window_width = width + 75;
    window_height = height + 100;
  } else if (type == "video") {
    window_width = width + 75;
    window_height = height + 115;
  } else if (type == "swf") {
    window_width = width + 75;
    window_height = height + 100;
  } else if (type == "text") {
    window_width = width;
    window_height = height;
  } else if (type == "mp3") {
    window_width = width + 50;
    window_height = height + 100;
  } else if (type == "iframe") {
    window_width = width + 75;
    window_height = height + 100;
  }

  window.open("display.php?type="+type+"&title="+title+"&file="+file+"&width="+width+"&height="+height, "emgr_popup", "width="+window_width+",height="+window_height+",resizable=yes,scrollbars=no,toolbar=no,directories=no,status=no,statusbar=no,menubar=no,copyhistory=no");
}