<!DOCTYPE html> <html> <head> <meta charset= "utf-8" > <title>进度条效果</title> <script src= "http://libs.baidu.com/jquery/1.9.0/jquery.js" ></script> <style type= "text/css" > #progress { background:white; height:20px; padding:2px; border:1px solid green; margin:2px; } #progress span { background:green; height:16px; text-align:center; padding:1px; margin:1px; display:block; color:yellow; font-weight:bold; font-size:14px; width:0%; } </style> <script type= "text/javascript" > var progress_node_id = "progress" ; function SetProgress(progress) { if (progress) { $( "#" + progress_node_id + " > span" ).css( "width" , String(progress) + "%" ); $( "#" + progress_node_id + " > span" ).html(String(progress) + "%" ); } } var i = 0; function doProgress() { if (i > 100) { alert( "Progress Bar Finished!" ); return ; } if (i <= 100) { setTimeout( "doProgress()" , 500); SetProgress(i); i++; } } $(document).ready( function () { doProgress(); }); </script> </head> <body> <h1>jQuery实现进度条效果代码</h1> <p>原理就是使用 Javascript 控制 SPAN CSS 的宽度（以及其他的样式），刷新查看</p> <div id= "progress" ><span></span></div> </body> </html>