<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
window.onload=function(){
var oDiv=document.getElementById("div1");
var oInput=document.getElementById("input1");
oInput.onclick=function(){
var arr=oDiv.innerHTML.split(",");
arr.push(arr[0]); //pop unshift
arr.shift();
oDiv.innerHTML=arr;
}
}
</script>
</head>
<body>
<div >1,2,3,4</div>
<input type="button" value="切换" />
</body>
</html>