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源代碼:

<!DOCTYPE html>
<html>
<head>
<style>
.ancestors *
{ 
display: block;
border: 2px solid lightgrey;
color: lightgrey;
padding: 5px;
margin: 15px;
}
</style>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("span").closest("ul").css({"color":"red","border":"2px solid red"});
});
</script>
</head>

<body class="ancestors">body (great-great-grandparent)
  <div style="width:500px;">div (great-grandparent)
    <ul>ul (second ancestor - second grandparent) 
    <ul>ul (first ancestor - first grandparent)
      <li>li (direct parent)
        <span>span</span>
      </li>
    </ul>
    </ul>   
  </div>
</body>

</html>

運行結果：

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