text: // plugins/iframe.js
  ///import core
  ///import plugins\inserthtml.js
  ///commands 插入框架
  ///commandsName  InsertFrame
  ///commandsTitle  插入Iframe
  ///commandsDialog  dialogs\insertframe
  
  UE.plugins['insertframe'] = function() {
    var me =this;
    function deleteIframe(){
      me._iframe && delete me._iframe;
    }
  
    me.addListener("selectionchange",function(){
      deleteIframe();
    });
  
  };
  