<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>进度条</title>
</head>
<style type="text/css">
#bar{
animation:move 2s;
text-align:center;
height:50px;
line-height:50px;
background:#6caf00;
}
@keyframes move{
0%{
width:0;
}
100%{
width:100%;
}
}
</style>
<script type="text/javascript">
function $(id){
return document.getElementById(id);
}
function ss(){
var a = $("a").value;
var b = $("b").value;
var c = $("c").value;
var d = $("d").value;
var s = ((d - c) / (b - a)).toFixed(4)*100 + "%";
$("bar").style.width = s;
$("bar").innerHTML = s;
}
</script>
<body>
<progress id ="pro" value ="0" max = "100"></progress>
</body>
<script type="text/javascript">
window.onload = function(){
var pro = document.getElementById("pro");
setInterval(function(e){
if(pro.value != 100) pro.value++;
else pro.value = 0;
},10);
}
</script>
</html>
![](https://images2018.cnblogs.com/blog/1250890/201807/1250890-20180720111350181-46867876.png)