英[???ndeks] 美[???n?d?ks]
n.index;<number>index;instruction;sign
vt.index...;index...;[???] ?? ??(??, ??, etc.)
vi.[Mechanics] Transposition
3?? ??: indexes ??: indices indexes ?? ??: indexing ?? ??: indexed ?? ??: indexed
?????? zIndex ?? ???
??: ??? ?? ??? ?????.
??: ??Object.style.zIndex=auto|number
??: ??? ?? Z-?? ?? ?? ?? ? ????. Z-??? ??? ??? ??(?: position:absolute;)??? ?????.
?????? zIndex ?? ?
<html>
<head>
<style type="text/css">
#img1
{
position:absolute;
left:0px;
top:0px;
z-index:-1
}
</style>
<script type="text/javascript">
function changeStackOrder()
{
document.getElementById("img1").style.zIndex="1";
}
</script>
</head>
<body>
<h1>This is a Heading</h1>
<img id="img1" src="http://img.php.cn/upload/article/000/005/656/5af270fd37755429.jpg" width="100" height="180">
<p>Default z-index is 0. Z-index -1 has lower priority.</p>
<input type="button" onclick="changeStackOrder()" value="Change stack order" />
</body>
</html>???? ?? ?
??? ????? ??? "???? ??" ??? ?????