I don't think it's the file on Apple's end. I think it's something to do with the "state of the OS" (in this case, his 27-in. IMac running [whatever], and my Lenovo running WinXP). I have several XP machines here at work, all running IE7, and they can see the trailer drop-down just fine....it has to be something that I installed/changed on my Lenovo that is causing the corruption.
Scriptaculous is a web 2.0 Javascript library. It comes pre-packaged in many web development frameworks (Ruby on Rails, Seaside, etc), but is also available for general download & use:
http://script.aculo.us/
Apple is using it, or maybe even a modified version of it, in trailers.com.
But, like I mentioned before...I don't think it's the file itself...if it was, the problem would be much more wide-spread. Rather, I think it's my computer's mode & method of interpreting said file that's causing the issue. It HAS to be something I installed or changed....the questions is, what.