Function name as variable?

I need a way to call a function from a function. It’s not that hard, I know, but the name of the nested function is a variable passed into the first function. Like in setTimer() and other functions in flash, where you have the name of a variable to call. I’m going to have a lot, so doing some cheap if(funcname == blabla){blabla();} won’t work. I’m not sure if that makes much sense, but yeah… All my searches return useless things.