W3School TIY
编辑您的代码：
<html> <head> <script type="text/javascript" src="../jquery/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $(".btn1").click(function(){ $("body").animate({backgroundPosition:"40% 40%"},0); }); $(".btn2").click(function(){ $("body").animate({backgroundPosition:"0% 0%"},0); }); }); </script> </head> <body style="background-image:url(/i/eg_background.jpg);background-repeat:no-repeat;background-attachment:fixed;"> <p>This is a paragraph.</p> <button class="btn1">Animate</button> <button class="btn2">Reset</button> </body> </html>
查看结果: