简易js进度条

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>pregressbar03</title>

</head>

<body>

      <style type="text/css">

            #progress {

            height: 20px;

            border: 1px solid pink;

            }

           #bar_span{

            display:block;

             width: 0%;

             height:20px;

             background: green;

             }

        </style>

        <script type="text/javascript" src="http://libs.baidu.com/jquery/2.0.0/jquery.js"></script>

        <script type="text/javascript">

            function SetProgress(ress) {

                if (ress){

                    $("#bar_span").css("width", String(ress) + "%");

                }

            }

            var i = 0;

            function doProgress() {

                if (i <= 100) {

                    setTimeout("doProgress()", 100);

                    SetProgress(i);

                    $("#percent").text(i+"%");

                    i++;

                }

            }

            $(document).ready(function() {

                doProgress();

            });

        </script>

     <h1>Javascript 进度条 Demo</h1>

    <p>原理就是使用 Javascript 控制 SPAN CSS 的宽度（以及其他的样式）</p>

    <div id="progress"><span  id="bar_span"> </span>

                       <span id="percent">0%</span>

    </div>

</body>

</html>
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