Camera Rotate animation

In my menu, I have to animations to rotate the camera to a different part of the menu (i.e options or credits). But it seems like the animations are not playing when I click the buttons. Also, when I tried to make an Animation Controller for the animations, it would just keep playing them over again and there was no control. Is there a way to control this in scripting? How? Also you can take a look at my script to see what I am doing wrong (I am using NGUI and the function OnButtonClick() function is correct).

 #pragma strict
 
 var button = "play"; //user types in value for different types of buttons in the menu
 var LevelToLoad = 0; 
 //Leave this option blank if you are loading the credits or something else in the same scene.
 var MainCamera : Animation;
 var MenuPannel : GameObject;
 var FaderBack : GameObject;
 var FaderFront : GameObject;
 var isFaderFrontActive = true;
 var isFaderBackActive = false;
 
 function OnButtonClick()
 {    
     MainCamera = GetComponent("Animation");
     
     if(button == "play")
     {    
         Application.LoadLevel(LevelToLoad);
     }
     
     if(button == "exit")
     {
         Application.Quit();
     }
     
     if(button == "credits")
     {
         animation.Play("CameraRotate");
         MenuPannel.SetActive(false);
         Destroy(FaderFront);
         
         if(isFaderBackActive == false)
         {
             Instantiate(FaderBack);
             isFaderBackActive = true;
         }
     }
     
     if(button == "back")
     {
         animation.Play("CameraRotateBack");
         MenuPannel.SetActive(true);
         Instantiate(FaderFront);
         Destroy(FaderBack);
         isFaderBackActive = false;
     }
 }