<script type="text/javascript">
window.onload = function()
{
var box = document.getElementById(‘box_0531‘);
var obj = box.getElementsByTagName(‘div‘), ar = [];
//var obj = box.getElementsByClassName(‘cont‘), ar = []; 获取所有指定class名字
for (var i = 0; i < obj.length; i ++)
ar.push(obj[i]);
function sortRandom(a, b) {
return Math.random() - 0.5;
}
ar.sort(sortRandom);
box.innerHTML = ‘‘;
for (var i = 0; i < ar.length; i ++)
box.appendChild(ar[i]);
}
</script>
</head><body>
<div class="box_0531" id="box_0531">
<div class="cont" id="cont1">CONT1</div>
<div class="cont" id="cont2">CONT2</div>
<div class="cont" id="cont3">CONT3</div>
<div class="cont" id="cont4">CONT4</div>
<div>CONT5</div>
<div>CONT6</div>
</div>
原文：http://taoyouth.blog.51cto.com/2793776/1750923