Code review comment for lp:~rvb/maas/reveal-bug

The screenshot is a nice touch. I tried to find some helpful utility function or attribute in YUI to simplify this job, but the documentation was so terse it was just meaningless to me. Might be docHeight, for instance, but it might not. :(

One question: should this really include the margin? It seems a bit "greedy" to take that space too. Then again I guess it depends on the page.