<html>
<head>
<style>
#myDIV
{
position:absolute;
width:100px;
height:100px;
background-color:coral;
color:white;
}
</style>
</head>
<body>
<p>点击“尝试一下”按钮设置 DIV 元素的 boxShadow 属性：</p>
<button onclick="myFunction()">尝试一下</button>
<div id="myDIV">
<h1>myDIV</h1>
</div>
<script>
function myFunction()
{
document.getElementById("myDIV").style.boxShadow = "10px 20px 30px lightblue";
}
</script>
</body>
</html>