<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>进度条（progress）测试</title>
</head>
<body>
<h2>进度条（progress）测试</h2>
<progress value="0" max="100">您的浏览器不支持 HTML5 progress 标签</progress><p>
<input type="button" value="开始" onclick="startProgress()"/>
<script type="text/javascript">
function startProgress(){
var bar = document.getElementsByTagName("progress")[0];
execProgress(bar, 0);
}
function execProgress(bar, value){
var value = value+1;
bar.value = value;
if (value < 100) {
setTimeout(function(){execProgress(bar, value);}, 30)
}else{
setTimeout(function(){alert("完成")}, 30);
}
}
</script>
</body>
</html>
