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源代码：
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<!DOCTYPE html> <html> <head> <script src="//libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("p").has("b,span").css("background-color","yellow"); }); </script> </head> <body> <h1>Welcome to My Homepage</h1> <p>My <span>name</span> is Donald.</p> <p>I live in <span>Duckburg</span>.</p> <p>My best friend is <b>Mickey</b>.</p> <p>In this example, we select all p elements that have span or b elements inside of them.</p> </body> </html>
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