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The Z-INDEX Property

On a Web page, Web elements exist in only two dimension: the X (horizontal) and Y (vertical) axes. On a regular Web page, elements are either above or below, or to the right or left of, another element. With the advent of the POSITION property, a third dimension is added, so that things can appear either "in front of" or "behind" other elements. This third axis is known as the Z axis, and elements can be controlled in this fashion by using the Z-INDEX property.

Z-INDEX

Description: Sets the stacking level of the specified box in relation to the current stacking context. It also determines whether the specified box sets up a localized stacking context.


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