I went into the cpanel of hostgator and over there they allow to use specific mime types for Gzip compression. Earlier I was using the option to compress all but the result was horrible, Gzip was hurting the flash files and they were not working properly, so now I have decided to use mime types.
I have found the following format give in the space where I will enter more mime types in host gator, it is like this

text/html text/plain text/xml

by looking at it I think to add another mime type to it, all one need to do is to add space to it but I am not sure. So I wanted to know how exactly it is done, is my assuption correct.

e-g if I want to add mime type for Javascript will it be like this

text/html text/plain text/xml application/x-javascript

I got this mime type of javascript from the below link

My target files are only two = Javascript and CSS