源代码:
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("h1").add("p").add("span").css("background-color","yellow"); }); </script> </head> <body> <h1>Welcome</h1> <p>A p element.</p> <p>Another p element.</p> <span>A span element.</span> <span>A span element.</span><br><br> <div>This example adds the same css style for both p and span elements, as the existing h1 element.</div> </body> </html>
运行结果：