Specifies how the background image behaves when the user scrolls the page. The image either scrolls along with the content(default), or remains in one place. Notice that in IE6 and earlier this property works only for the body element.
background-attachment: fixed;
IE5.5+, FF1+, SA1.3+, OP9.2+
| fixed | Locks the image in place. |
| inherit | The property uses the same value as the same property of the parent element. |
| scroll | Normal behavior, the image will scroll along with the text. |