jquery:has()选择器
转载自: http://www.runoob.com/jquery/sel-has.html
<DOCTYPE html>
<html>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("p:has(span)").css("border","solid red");
});
</script>
</head>
<body>
<p><span>This is a span element inside a p element.</span></p>
<p>This is a p element with no span element.</p>
</body>
</html>