function show_chat_room(session_code, room_code) {
  var date = new Date();

  var attributes = {
     id   : "ExternalMain",
     name : "ExternalMain"
  };

  var params = {
    allowScriptAccess : 'sameDomain',
    quality           : 'high',
    bgcolor           : '#ffffff'
  };

  var flashvars = {
    session_code : session_code,
    room_code    : room_code
  };

  swfobject.embedSWF("Chat.swf?" + date.getTime(), "disp", "10", "10", "8", false, flashvars, params, attributes)
}