Trying to change button background using materials

In my project I want to be able to change background of a button by using the action performed of another button. I was curious as to if using textures or materials would be the best route for this.

Doing so I have code so far as to what I am trying to do. The four buttons will work for a single action but I would like to be able to to keep using if I choose a button and then want to go back to the previous selection by pressing that button.

Please help, (in UnityScript) I am sure this is an easy fix, I am just not seeing it! Thanks again

var materials : Material[];

//Dimensions for the Materials UI

private var glassOptionButton : Rect = Rect(10,20, 50,50);

private var stoneOptionButton : Rect = Rect(65,20, 50,50);

private var brickOptionButton : Rect = Rect(10,72, 50,50);

private var paintedDrywallOptionButton : Rect = Rect(65,72, 50,50);

private var copperOptionButton : Rect = Rect(10,125,50,50);

// Boolean vars for the different materials

private var isGlass : boolean = false;

private var isStone : boolean = false;

private var isBrick : boolean = false;

private var isDryWall : boolean = false;

function OnGUI() {

GUI.Window(1,materialsWindow, materialsWindowFunc, "Material Window");

}

function materialsWindowFunc(windowID: int) {

if(GUI.Button(glassOptionButton, "GL")) { isGlass = true;

if(isGlass == true) { textureButton = materials[2]; } Debug.Log(textureButton); } if(GUI.Button(stoneOptionButton, "STO")) { isStone = true;

if(isStone == true) { textureButton = materials[5]; } Debug.Log(textureButton); } if(GUI.Button(brickOptionButton , "BR")) { isBrick = true;

if(isBrick == true) { textureButton = materials[0]; } Debug.Log(textureButton); } if(GUI.Button(paintedDrywallOptionButton, "PDW")) { isDryWall = true;

if(isDryWall == true) { textureButton = materials[3]; } Debug.Log(textureButton); }

}