以下jQuery代码,不能够实现网页加载完成后弹出消息框的是:( ) A.
       $(document).ready(function( ){
          alert("write less, do more.");
       });
B.
        $(function( ){
          alert("write less, do more.");
        });
C.
        $(function show( ){
          alert("write less, do more.");
        });
D.
        $(function( ){
         document.write("write less, do more.");
        });