javascript editor with html launcher

Just beginning to learn javascript, I tried Textpad and I liked how I could create an HTML page, save it and launch it from a browser without leaving TextPad.  When I close the launched page, I am sent back into the HTML code in the editor.

But TextPad does not have a good javascript editor.  I found Free Javascript Editor and I like the way it provides intellisense and syntax checking and debugging for my Javascript and HTML code.  But it does not have a way to launch the HTML page without leaving the editor.

Anyone know of an editor that can provider all of the features I mentioned?

Oh, and to make the question even more impossible, it needs to be free.  

(Accepted answer will be docked 100 pts if it is not free....just kidding....grin. )