<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JavaScript</title>
<style>
#outBox{
width:600px;
height:30px;
border:1px solid #333;
}
#inBox{
background-color:#abcdef;
height:30px;
width:0%;
}
</style>
</head>
<body>
<h1>滚动条实例</h1>
<hr>
<div id="outBox">
<div id="inBox"></div>
</div>
<script>
//获取div
var inBox = document.getElementById('inBox');
//定时调用
var timer = setInterval(run, 100);
var m = 0;
//定义函数
function run(){
m ++;
inBox.style.width = m+'%';
//判断
if (m >= 100) {
clearInterval(timer);
}
}
</script>
</body>
</html>