jquery如何在类选择的时候操作选中元素

<html>
<head>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.11.0-beta1.js"></script>
</head>
<body>    <div class="a">a</div>
    <div class="a">b</div>
    <div class="a">c</div>
    <div class="a">d</div>
    <div class="a">e</div>
    <script language="javascript">
        $(function(){
            $(".a").each(function () {
                $(this).click(function(){
                    $(this).prepend("此项被点中!.");
                })            });        })    </script>
</body></html>