if you prefer to make your source a bit more obfuscated, the tool you can use would be Dean Edward's Packer. This tool obfuscates your script, saving thus quite a fraction of the file size. However there's only one rule your scripts need to obey to use this tool:
The packing algorithm is forgiving of all forms of JavaScript with one exception. You must correctly terminate all JavaScript statements with semi-colons. This includes function declarations.
