实现了百分比动态进度条效果，实际应用通常需要和后台配合使用。
代码实例如下:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>web前端学习交流扣qun：731771211 志同道合者进</title>
<style>
#progressBox{
width: 300px;
height: 40px;
border: 1px solid #c8c8c8;
background: white;
position: relative;
}
#progressBar{
position: absolute;
left: 0;
top: 0;
z-index: 2;
height: 40px;
width: 100%;
line-height: 40px;
color: white;
text-align: center;
font-size: 20px;
font-weight: bold;
font-family: Georgia;
clip: rect(0px,0px,40px,0px);
background: #00A1F5;
}
#progressText{
position: absolute;
left: 0;
top: 0;
z-index: 1;
width: 100%;
height: 40px;
line-height: 40px;
color: black;
text-align: center;
font-size: 20px;
font-weight: bold;
font-family: Georgia;
}
</style>
<script>
window.onload = function () {
var iNow = 0;
var timer = setInterval(function (argument) {
if (iNow == 100) {
clearInterval(timer);
} else {
iNow += 1;
progressFn(iNow);
}
}, 30);
function progressFn(cent) {
var oDiv1 = document.getElementById('progressBox');
var oDiv2 = document.getElementById('progressBar');
var oDiv3 = document.getElementById('progressText');
var allWidth = parseInt(getStyle(oDiv1, 'width'));
oDiv2.innerHTML = cent + '%';
oDiv3.innerHTML = cent + '%';
oDiv2.style.clip = 'rect(0px,' + cent / 100 * allWidth + 'px,40px,0px)';
function getStyle(obj, attr) {
if (obj.currentStyle) {
return obj.currentStyle[attr];
}
else {
return getComputedStyle(obj, false)[attr];
}
}
}
}
</script>
</head>
<body>
<div id="progressBox">
<div id="progressBar">0%</div>
<div id="progressText">0%</div>
</div>
</body>
</html>