CSS: overflow:scroll & background-attachment:scroll

[Beat]

Laut selfhtml müsste dieses Problem mit background-attachment:scroll lösbar sein. Bei mir funktioniert das aber leider weder mit FF 3.0.13 und mit IE 8 nur in der Kompatiblitätsansicht...

CSS 2.1 spec http://www.w3.org/TR/CSS2/colors.html

"If a background image is specified, this property specifies whether it is fixed with regard to the viewport ('fixed') or scrolls along with the containing block ('scroll').

Note that there is only one viewport per view. If an element has a scrolling mechanism (see 'overflow'), a 'fixed' background does not move with the element, and a 'scroll' background does not move with the scrolling mechanism."

Die Fomulierung lässt keinen Raum für: and a scroll background does move within the scrolling mechanism.

Grund: There is only one viewport per view.

An anderer Stelle: http://www.w3.org/TR/CSS2/visuren.html#viewport
"When the viewport is smaller than the area of the canvas on which the document is rendered, the user agent should offer a scrolling mechanism. There is at most one viewport per canvas, but user agents may render to more than one canvas (i.e., provide different views of the same document). "

Da ist also nur ein screen canvas und ein print canvas, ergo nur ein viewport.

mfg Beat