Background-clip

The   property is used in CSS and certain HTML elements. It specifies whether an element's background, either the color or image, extends underneath its border. If there is no background-image, this property only has a visual effect when the border has transparent regions (because of ) or partially opaque regions; otherwise the border covers up the difference.

Values

 * - Default value. The background extends to the outside edge of the border (but underneath the border in z-ordering). Use  instead for compatibility with older versions of Gecko. (Requires Gecko 2.0)
 * -No background is drawn below the border (background extends to the outside edge of the padding). Use  instead for compatibility with older versions of Gecko. (Requires Gecko 2.0)
 * - The background is painted within (clipped to) the content box. (Requires Gecko 2.0)