Reversing an animation after play

Unity Engine
1

Hey guys i can get my model to play its animation on a GUI button press but when i want to do i have it play forward on first press then play the animtion in reverse on the second press and so on. Here is what i have so far but it dosnt seem to like the animation.time and animation.speed.

var time:float;
var speed:float;

function OnGUI() 
{

    //Button 1

    if(GUI.Button (Rect(1060,0,200,100), "Explode View"))
     {
        {
      (animationstate.time = 0.0)
        animation.Play();
        
        }
        else
        {
        
        animation.Play();
        animationstate.speed = -1.0
        }

     }
}

Thanks D

2

Hope this code helps. i am not good in Unity Javascript, so watch out for errors

var time:float;
var speed:float;
var isMoveForwardAnim:boolean = true;  //Initialy its set to True to move forward

function OnGUI() 
{
    //Button 1
    if(GUI.Button (Rect(1060,0,200,100), "Explode View"))
     {
         if(!animation.isPlaying)    //Prevent from playing if animation is already playing
             {
                 if(isMoveForwardAnim)
                   {
                          animationstate.speed = 1.0;
                          animation.Play("Walk");
                          isMoveForwardAnim = false;
                   }
                else
                  {        
                         animationstate.speed = -1.0;
                         animation.Play("Walk");
                         isMoveForwardAnim = true;
                  }
           }  
    }
}
3

Thanks but im getting this error from it and im not sure how to give it access.

Assets/MyScripts/ExplodeView.js(27,42): BCE0020: An instance of type ‘UnityEngine.AnimationState’ is required to access non static member ‘speed’.