Background-Attachment

Syntax: background-attachment : value
Possible Values : scroll | fixed
Initial Value : scroll
Applies to: All elements
Inherited : No

The background-attachment property determines if a specified background image will scroll with the content or be fixed with regard to the canvas. For example, the following specifies a fixed background image:

Example:

BODY { background: white url(circle.gif); background-attachment: fixed }
see example in action

Authors may also use the shorthand background property, which is currently better supported than the background-attachment property.