<html>
<head>
<script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
<script type="text/javascript">
$(document).ready(function(){
$("div ul:only-child").text("only has ul").css("border", "2px blue solid");
});
</script>
</head>
<body>
<div>
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
</ul>
</div>
<div>
<ul>
<li>D</li>
<li>E</li>
<li>F</li>
<li>G</li>
</ul>
</div>
<div>
<ul>
<li>H</li>
<li>I</li>
<li>J</li>
<li>K</li>
</ul>
</div>
</body>
</html>
The code above is rendered as follows:
【children_index】
