HTML and CSS Reference
A good explanation of the di " erences between background-clip and
background-origin is available on CSS3.info.
NEW PROPERTY: BACKGROUND SIZE
The background-size property is used to resize your background image.
There are a number of possible values:
• background-size: contain;
scales down image to fit element (maintaining pixel aspect ratio).
• background-size: cover;
expands image to fill element (maintaining pixel aspect ratio).
• background-size: 100px 100px;
scales image to the sizes indicated.
• background-size: 50% 100%;
scales image to the sizes indicated. Percentages are relative to the size
of containing element.
You can read up on some examples of special cases on the CSS 3