Tint on rollOver

hello… i wonder if i can do a button that on rollOver do math.random so it automatic change the tint on a movieclip???

[color=darkred][color=#000000]

[/color]on(rollOver){[/color]
[color=darkred]	tellTarget("text_effect")[/color]
	[color=olive]//and something here [/color]
[color=olive]	 (change tint with math.random) arent good at as :(
[/color][color=black]

[/color]