Although I don't use Adobe GoLive much for day-to-day work, it has certain features that are hard to find anywhere else. One of them is a rather impressive Javascript authoring environment. It gives contextual hints, code coloring and lists your functions in a drop-down selection menu. GoLive seems to go farther in previewing javascripts than Dreamweaver does, but I'm not so sure how useful that really is yet.

It also has a debugger that I haven't tried yet. To use the javascript authoring features, select

File:New: Scripting: Scripts: Javascript