Background attachment

* This CSS property allows the developer to define whether the background is fixed or whether it scrolls with the document.
* The DEFAULT setting is to have it scrolling with the content.
* To keep the background static set the property's value to fixed.
* To have the background scrolling (the same as the default) set the value to scroll.
* There is also a third option: background-attachment:inherit;
* This means that it would inherit the background-attachment property's value from its parent (remember this is not the default so it would have to be explicitly specified).
* Be careful when you use the background-attachment:fixed; option though as it can be confusing for the user and make the content difficult to read.