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CSS Reference

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CSS Properties

animation
appearance
backface-visibility
background
border
bottom
box
caption-side
clear
clip
color
column
content
counter-increment
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cursor
direction
display
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left
letter-spacing
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margin
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nav
opacity
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page-break
perspective
perspective-origin
position
punctuation-trim
quotes
resize
right
rotation
rotation-point
table-layout
target
text
top
transform
transition
vertical-align
visibility
width
white-space
word-spacing
word-break
word-wrap
z-index

CSS z-index Property

CSS Reference Complete CSS Reference

Example

Set the z-index for an image:

img
{
position:absolute;
left:0px;
top:0px;
z-index:-1;
}

Try it yourself »

Definition and Usage

The z-index property specifies the stack order of an element.

An element with greater stack order is always in front of an element with a lower stack order.

Note: z-index only works on positioned elements (position:absolute, position:relative, or position:fixed).

Default value: auto
Inherited: no
Version: CSS2
JavaScript syntax: object.style.zIndex="1"

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The z-index property is supported in all major browsers.

Note: The value "inherit" is not supported in IE7 and earlier. IE8 requires a !DOCTYPE. IE9 supports "inherit".

Property Values

Value Description Play it
auto Sets the stack order equal to its parents. This is default Play it »
number Sets the stack order of the element. Negative numbers are allowed Play it »
inherit Specifies that the z-index should be inherited from the parent element

Related Pages

CSS tutorial: CSS Positioning

HTML DOM reference: zIndex property

CSS Reference Complete CSS Reference
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