Use arrays to fire functions

1

Can I store function names in arrays, which then can be used to fire those functions when that array value is called?
So basically - I mouse click, and that += 1 to my num var.

var myF:Array = new Array("thisone","thatone");
var num:Number = 0;
function thisone()
{
/////do whatever/////
}
onEnterFrame = function()
{
////////fire the function named as the array states!///////
myF(num)
}
MouseListener.onMouseDown = function(){
num ++;
}

I dont know how to make a function call from a string value! Get me??
Help would be ace!