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);
})();