<html>
<head>
<style>
#main {
width: 400px;
height: 150px;
border: 1px solid #000000;
display: flex;
}
#main div {
width: 70px;
height: 70px;
}
</style>
</head>
<body>
<div id="main">
<div style="background-color:coral;" id="myRedDIV"></div>
<div style="background-color:lightblue;" id="myBlueDIV"></div>
<div style="background-color:lightgreen;" id="myGreenDIV"></div>
<div style="background-color:pink;" id="myPinkDIV"></div>
</div>
<p>点击“尝试一下”按钮，改变四个 DIV 的顺序：</p>
<button onclick="myFunction()">尝试一下</button>
<script>
function myFunction()
{
document.getElementById("myRedDIV").style.order = "4";
document.getElementById("myBlueDIV").style.order = "3";
document.getElementById("myGreenDIV").style.order = "1";
document.getElementById("myPinkDIV").style.order = "2";
}
</script>
<p><b>注意：</b>Internet Explorer 和 Safari 不支持 order 属性。</p>
</body>
</html>