Text color, rollover and JavaScript?

I'm using JavaScript to change button text color depending on certain variables, after a separate button click (different button).  The problem is that when the user rolls over the colored text button, it loses the JS color when it returns to normal state.  I was hoping to keep the rollover state, but do I need to delete it, or is there a way to have the normal state retain the JS color after the rollover?  Thanks!