​x
 
<!DOCTYPE html>
<html>
<head>
<script src="../jquery/jquery-1.11.1.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("#w3s").attr("href", function(i,origValue){
      return origValue + "/jquery"; 
    });
  }); 
});
</script>
</head>
​
<body>
<p><a href="http://www.gxlcms.com/" id="w3s">gxlcms.com</a></p>
<button>改变 href 值</button>
<p>请把鼠标指针移动到链接上，或者点击该链接，来查看已经改变的 href 值。</p>
</body>
</html>
​