javascript help with variables

With some help, I wrote this javascript.

http://pastebin.com/uSSZp0j6

I don't understand how to add more than one variable to a variable, I need for there to be several "keycodes," not just one. Other than that, the script works fine.

>>17
You're projecting. FrozenVoid drove me away two years ago and I'm back with a vengeance, cretin.