js 文档加载完成之后执行 备用

 //文档加载完成之后执行
 (function(){
         var _globeCallback;
         window.$$ = function(callback){
             _globeCallback = callback;
         };
         function documentReady(){
             _globeCallback();
         }
     //document ready --mobile -webkit
     var listenerDocumentReady = function(){
         console.log(document.readyState);
         if(document.readyState=='complete'){
              documentReady();
              clearInterval(_readyInterval);
          }
     }
     var _readyInterval = setInterval(listenerDocumentReady,10);
 })();