HTML DOM backgroundAttachment 屬性
定義和用法
backgroundAttachment 屬性設置背景圖像是否固定或者隨著頁面的其余部分滾動。
語法：
Object.style.backgroundAttachment=scroll|fixed
提示和注釋
提示：請設置一種可用的背景顏色，這樣的話，假如背景圖像不可用，頁面也可獲得良好的視覺效果。
實例
本例設置在點擊按鈕后把背景圖像設置為固定（不滾動）：
<html>
<head>
<style type="text/css">
body
{
background-color="#FFCC80";
background-image:url(bgdesert.jpg);
}
p
{
color:white;
}
</style>
<script type="text/javascript">
function changeAttachment()
{
document.body.style.backgroundAttachment="fixed";
}
</script>
</head>
<body>
<input type="button" onclick="changeAttachment()"
value="Set background-image to be fixed" />
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
</body>
</html>