Simple question about functions

Hi there

I have a simple question about functions.
I have a few scripts for my buttons, each button has its own script. I have also a script for colormodifications, But I do not want to copy that complete script in each button.

Here is a simplified version of the scripts for my buttons

but_bedrijf.onPress = function() {
	gotoAndStop("mainmenu");
}

but_sectionalep.onPress = function() {
	gotoAndStop("sectionalep");
}

but_buitenp.onPress = function() {
	gotoAndStop("buitenp");
}

but_pauto.onPress = function() {
	gotoAndStop("pauto");
}

Here is the function I’d like to be called in every script.

blueColor = function() {
	var my_color:Color = new Color(this);
	my_color.setRGB(0x46AAC2);
}

I would like that the button changes of color when I Pressed on it.

I know I should type in every script this code
blueColor();

But my complete set of buttons changes to blue, Isn’t there something we have to put between those ().

Thanx in advance