<!doctype html> <html> <head> <meta charset="utf-8"> <script src="jquery-1.11.2.js"></script> <script> $(function () { $('#div1').css('background','red'); $('#div1').click(function () { $(this).html('hello'); }) $('li').filter('[title = box]').css('background','green'); $('#div1').attr('title','123'); }) </script> <title>无标题文档</title> </head> <body> <div id="div1">div1</div> <ul> <li>1</li> <li title="box">2</li> <li title="box">3</li> <li>4</li> </ul> </body> </html>