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(){ function aniDiv(){ $("#box").animate({width:300},"slow"); $("#box").animate({width:100},"slow",aniDiv); } aniDiv(); $(".btn1").click(function(){ $(":animated").css("background-color","blue"); }); }); </script> <style> div { background:#98bf21; height:40px; width:100px; position:relative; margin-bottom:5px; } </style> </head> <body> <div></div> <div id="box"></div> <div></div> <button class="btn1">Mark animated element</button> </body> </html>
查看结果: