代码示例:(标识:jquery_dom_attr_get)
<!DOCTYPE html>
<html>
<head>
<script src="/jquery/jquery-1.11.1.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    alert($("#w3s").attr("href"));
  });
});
</script>
</head>

<body>
<p><a href="https://www.sucainiu.com" id="w3s">(www.sucainiu.com)</a></p>
<button>显示 href 值</button>
</body>

</html>
运行结果: