PUBLIC MARKS from Spone with tag fixed

Midnight.js lets you switch fixed headers on the fly

Don't allow elements to scroll out of view by having them stick to the top or bottom of a window.

Internet Explorer 7 applies its numerous CSS changes – including support for fixed positioning – only in ‘standards-compliant mode’. Both methods described below should still be ‘safe’ to use (albeit for different reasons). More info about new possibilities and consequences in terms of doctype-sniffing will be added soon.