<!DOCTYPE html>
<html>
<head>
<style>
#main { border: 15px solid transparent;
padding: 15px;
border-image: url(border.png);
border-image-slice: 30;
border-image-repeat: round;
}
</style>
</head>
<body>
<h1>使用 JavaScript 更改 border-image-repeat</h1>
<p id="main">此元素使用图像作为边框。</p>
<p>单击“试一试”按钮更改 borderImageWidth 属性的值。</p>
<button onclick="myFunction()">试一试</button>
<script>
function myFunction() { document.getElementById("main").style.borderImageRepeat = "stretch";}
</script>
<p><b>注意：</b> Internet Explorer 10 及更早版本不支持 border-image-repeat 属性。</p>
</body>
</html>