Note that the getelementsbyselector button should work in both ie and mozilla, except for namespace and prefix (which only work in Mozilla)
Although, I've disabled it in most cases, the insertrule button could crash ie with invalid selectors (at least invalid for ie). so beware!
The largscaletest button is a more thorough comparison of the element array which is collected, between the browser method (which the browser collects) and the getelementsbyselector method.
This only works in Mozilla.
Any comments, questions or bug reports are welcome.