Let me ask you something: Would you buy a Ferrari if you can't drive? Do you have any experience with Javascript/HTML/CSS ? If yes, go for it. If not: First learn it, use a good editor like Notepad++ and when you can really work with it, go for Dreamweaver
if you have the money the purchase it, then go for it.. Dreamweaver has a great auto complete feature for variables and functions it think..