<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<style>
#msg {
position:absolute;
100px;
background-color:blue;
color:white;
border:1px solid red;
}
</style>
<script>
var pos =0;
var direction=1;
onload = function () {
setInterval(run, 100);
}
function run() {
if (pos+100>=innerWidth) {
direction=-1;
}
if (pos<=0) {
direction = 1;
}
pos+=10*direction;
document.getElementById('msg').style.left = pos + "px";
}
</script>
</head>
<body>
<div id="msg">
跑马灯文本
</div>
</body>
</html>