Script Summary: shows broken image placeholders even if alt text has been specified!
Firefox has a very strange way of handling broken images. If there is no alt text then it will show the broken image placeholder, but if you use well formed markup and include an alt tag then the alt text will display instead of a broken image. This behavior is extremely frustrating while developing a site which is why I wrote this script.
* UPDATE 8/1/2008 - Fixed bug that was causing 'getAttribute is not a function' errors