Directory Viewer basically complete - 06/01/2006

Column sorting now uses mergesort, because my Q&D bubblesort was SLOW (thanks to Andy for the suggestion)

Subdirectories can also be opened/closed by clicking on them. Columns can be sorted in subdirectories, too. Hooray. You can see my view at work below.

I also made it IE-compatible, the first time I've done something for IE in ajax.