Background-attachment

The   property is used in CSS and certain HTML elements. If a  is specified, this property determines whether that image's position is fixed within the viewport, or scrolls along with its containing block.

Values

 * - If specified, the background image will scroll within the viewport along with the block the image is contained within.
 * - If specified, the background image will not scroll with its containing element, instead it will remain stationary within the viewport.

HTML example:

 Body content.

CSS example:

body { background-image:url("Wiki.png"); background-attachment:scroll; }