HTML and CSS Reference
In-Depth Information
The grey box has a z-index value of “9999″; the blue box has a z-index
value of “500″; and the gold box has a z-index value of “1″. Logically, you
would assume that the stacking order of these boxes should now be
reversed. But that is not the case, because none of these elements has the
position property set.
Here are the same boxes with position: relative added to each, and
their z-index values maintained:
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