How to headbob in mobile assets (joystick android)?

I need to Headbob my character in android device, but the script headbob

http://wiki.unity3d.com/index.php/Headbobber
doesn't work in android device because i must configure the joystick, i follow the steps of this answer

http://answers.unity3d.com/questions/459398/how-to-make-headbobber-on-joystick.html

but the compiler notice me an error with the unknow identifier waveslice and translate change, so, please help me writting me the answer, thanks

this is how i configure the script

 private var timer = 0.0; 
  var moveTouchPad : Joystick;
  var bobbingSpeed = 0.18; 
  var bobbingAmount = 0.2; 
  var midpoint = 2.0; 
  
  function Update () { 
     waveslice = 0.0; 
     horizontal = moveTouchPad.position.x; 
     vertical = moveTouchPad.position.y;  
     if (Mathf.Abs(horizontal) == 0 && Mathf.Abs(vertical) == 0) { 
        timer = 0.0; 
     } 
     else { 
        waveslice = Mathf.Sin(timer); 
        timer = timer + bobbingSpeed; 
        if (timer > Mathf.PI * 2) { 
           timer = timer - (Mathf.PI * 2); 
        } 
     } 
     if (waveslice != 0) { 
        translateChange = waveslice * bobbingAmount; 
        totalAxes = Mathf.Abs(horizontal) + Mathf.Abs(vertical); 
        totalAxes = Mathf.Clamp (totalAxes, 0.0, 1.0); 
        translateChange = totalAxes * translateChange; 
        transform.localPosition.y = midpoint + translateChange; 
     } 
     else { 
        transform.localPosition.y = midpoint; 
     } 
  }