I have disclosed my illness to certain people where I work; specifically upper management for my department, and my direct supervisor so they can, too, help me monitor my self and watch for patterns of mood swings so they can delegate work elsewhere. I know that's special treatment, but well, that's how the cookie crumbles.

They have been very supportive. Upper management have, so far, told me they are no strangers to mental illness, and are supportive and sympathetic to my... what's the word, illness. Again, I work in a professional envirenment, and most, i'd assume, professional companies have their management team take courses of Psychology to better understand and accept diversity.

But if it's your job you're worried about, unless they can prove that your illness severely impacts your job, and you are no longer able to proform, they cant fire you. They may reprimand, or inquire about what's going on, and you might have to disclose. But there are laws here in the USA to prevent termination based on mental and medical illness.