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The z-index property determines the stack level of an HTML element. The “stack level” refers to the element's position on the Z axis (as opposed to the X axis or Y axis). A higher value means the element will be closer to the top of the stacking order. This stacking order runs perpendicular to the display, or viewport.

The z-index is a property used to control the ordering of layers in the document. Elements with a higher z-index value appear above elements with lower values.

Headers and footers are the top and bottom sections of the document respectively. They are separate sections from the main document, and are often used to hold footnotes, page numbers, titles, and other information.

z-index defines which positioned element appears on top (Sort of like layers). So z-index: 1000 would appear on top of a z-index 999 . As mentioned above it is used for stacking elements. If they or their pieces are positioned at same place, the one with higher z-index will be on top.

In CSS code bases, you'll often see z-index values of 999, 9999 or 99999. This is a perhaps lazy way to ensure that the element is always on top. It can lead to problems down the road when multiple elements need to be on top. Most of the time you'll find that a z-index of 1 or 2 will suffice for your needs.

The footer tag is used within the body tag. The <footer> tag is new in the HTML5. The footer elements require a start tag as well as an end tag. A footer element typically contains authorship information, copyright information, contact information, sitemap, back-to-top links, related documents, etc.

Footers are located in the margin area at the bottom of a page. Headers and footers generally contain document information, such as the file name, author, date created, page numbering and the like. This information is repeated on each page and thus enables the reader to easily navigate the document.

What is z-index? z-index is the CSS property that controls the stacking order of overlapping elements on a page. An element with a higher z-index value will appear in front of an element with a lower z-index value. The property is called “z-index” because it sets the order of elements along the z-axis.

The z-index property determines the stack level of an HTML element. The “stack level” refers to the element's position on the Z axis (as opposed to the X axis or Y axis). A higher value means the element will be closer to the top of the stacking order. This stacking order runs perpendicular to the display, or viewport.

The z-index is a property used to control the ordering of layers in the document. Elements with a higher z-index value appear above elements with lower values.

Headers and footers are the top and bottom sections of the document respectively. They are separate sections from the main document, and are often used to hold footnotes, page numbers, titles, and other information.

z-index defines which positioned element appears on top (Sort of like layers). So z-index: 1000 would appear on top of a z-index 999 . As mentioned above it is used for stacking elements. If they or their pieces are positioned at same place, the one with higher z-index will be on top.

In CSS code bases, you'll often see z-index values of 999, 9999 or 99999. This is a perhaps lazy way to ensure that the element is always on top. It can lead to problems down the road when multiple elements need to be on top. Most of the time you'll find that a z-index of 1 or 2 will suffice for your needs.

The footer tag is used within the body tag. The <footer> tag is new in the HTML5. The footer elements require a start tag as well as an end tag. A footer element typically contains authorship information, copyright information, contact information, sitemap, back-to-top links, related documents, etc.

Footers are located in the margin area at the bottom of a page. Headers and footers generally contain document information, such as the file name, author, date created, page numbering and the like. This information is repeated on each page and thus enables the reader to easily navigate the document.

What is z-index? z-index is the CSS property that controls the stacking order of overlapping elements on a page. An element with a higher z-index value will appear in front of an element with a lower z-index value. The property is called “z-index” because it sets the order of elements along the z-axis.