CSS GUIDE Z INDEX
This document is a work in progress and is subject to change.
Summary
Z-index property sets the stack order of an element. An element with a greater stack order is placed on top of an element with a lower stack order. Negative numbers are also valid. Z-index only works on elements that have been set with absolute position.
Syntax
z-index: [number]
Legal Values
| Value | Description |
|---|---|
| auto | Stack number is equal to its parent |
| number | Define a custom stack number |
Mozilla Recommended Values
Usage Examples
<html>
<head>
<style type="text/css">
div.x{
position:absolute;
left:0px;
top:0px;
font-size:80px;
z-index:-1;
}
div.y{
position:absolute;
left:0px;
top:10px;
font-size:80px;
color:red;
z-index:1;
}
</style>
</head>
<body>
<div class="x">LAYER 1</div>
<div class="y">LAYER 2</div>
</body>
</html>
Notes
Specification Conformance
Browser Compatibility
Firefox,Netscape,Opera,IE