;(function() {
  var messagingIframe,
  bridge = 'campaign',
  CUSTOM_PROTOCOL_SCHEME = 'jscall';
  
  
  if (window[bridge]) { return }
  
  // 创建隐藏的iframe
  function _createQueueReadyIframe(doc) {
      messagingIframe = doc.createElement('iframe');
      messagingIframe.style.display = 'none';
      doc.documentElement.appendChild(messagingIframe);
  }
  
  window[bridge] = {};
  
  window[bridge]['closeWin'] = function closeWin(){
  document.location=CUSTOM_PROTOCOL_SCHEME + ':' + arguments.callee.name;
  };
  
  
  //创建iframe，必须在创建app之后，否则会出现死循环
  _createQueueReadyIframe(document);
  //通知js开始初始化
  //alert('onInjectJsOver='+typeof(onInjectJsOver));
  if(typeof(onInjectJsOver)=='function')
      onInjectJsOver();
  })();