通过事件获取元素的类。目标属性

I have the following code:

我有以下代码:

    <script type="text/javascript">
       $("*").click(function(event){
         var x = event.target;

         if (x.nodeName == "DIV"){                  
           alert(x.attr("class"));
         }

       })
    </script>
    <scr