Reset other animations on screen

Hello I have two simple animations controlled by individual GUI buttons. When the Red Button is pressed a red object slides onto the screen. When the Black button is pressed a black object slides onto the screen. I created these animations within Unity. Right now if I press each button both objects can slide onto the screen. I need to only have one object at a time on screen I would like to program it so when each button is pressed the other animation goes back to its starting point off screen. Is there something I can add to make this happen. Here is the code for the buttons. Thanks your help is greatly appreciated.

button 1

function OnGUI () { if (GUI.Button (Rect (10,10,70,20), "RED")) {

    animation.Play("Redinfo");   
}

}

button 2

function OnGUI () { if (GUI.Button (Rect (10,10,70,20), "BLACK")) {

    animation.Play("Blackinfo");   
}

}