Fix Swipe problem

I'm using and if the position of the character is bigger than 80 on the x axis. It's not possible to swipe to the right. And if the position of the character is smaller than -80 on the x axis, It's not possible to swipe to the left. This is the whole script:

     var minMovement: float = 20.0f;
     var sendLeftMessage: boolean = true;
     var sendRightMessage: boolean = true;
     var MessageTarget: GameObject = null;
  
     private var StartPos : Vector2;
     private var SwipeID = -1;
  
     function Update ()
     {
         if (MessageTarget == null)
             MessageTarget = gameObject;
         for (var T in Input.touches)
         {
             var P = T.position;
             if (T.phase == TouchPhase.Began && SwipeID == -1)
             {
                 SwipeID = T.fingerId;
                 StartPos = P;
             }
             else if (T.fingerId == SwipeID)
             {
                 var delta = P - StartPos;
                 if (T.phase == TouchPhase.Moved && delta.magnitude > minMovement)
                 {
                     SwipeID = -1;
                     if (Mathf.Abs(delta.x) > Mathf.Abs(delta.y))
                     {
                         if (sendRightMessage && delta.x > 0)
                             MessageTarget.SendMessage("OnSwipeRight", SendMessageOptions.DontRequireReceiver);
                         else if (sendLeftMessage && delta.x < 0)
                             MessageTarget.SendMessage("OnSwipeLeft", SendMessageOptions.DontRequireReceiver);
                     }
                 }
                 else if (T.phase == TouchPhase.Canceled || T.phase == TouchPhase.Ended)
                     SwipeID = -1;
             }
         }
     }
     
     function OnSwipeLeft()
 {
         transform.position -= Vector3.right*80;
         animation.CrossFade("LeftMove");
         if (transform.position.x > 80){
         //I don't have any idea what to do to prevent the character goes further than x=-80
         //If the x position is -80, you can't slide to the left anymore
         }
 }
     
     function OnSwipeRight()
 {
         transform.position += Vector3.right*80;
         animation.CrossFade ("RightMove");
         if (transform.position.x > 80){
         //I don't have any idea what to do to prevent the character goes further than x=80
         //If the x position is 80, you can't slide to the right anymore
         }
         
     }

But I have to do something with this part of the script:

 function OnSwipeLeft()
     {
             transform.position -= Vector3.right*80;
             animation.CrossFade("LeftMove");
             if (transform.position.x > 80){
             //I don't have any idea what to do to prevent the character goes further than x=-80
             //If the x position is -80, you can't slide to the left anymore
             }
     }
         
         function OnSwipeRight()
     {
             transform.position += Vector3.right*80;
             animation.CrossFade ("RightMove");
             if (transform.position.x > 80){
             //I don't have any idea what to do to prevent the character goes further than x=80
             //If the x position is 80, you can't slide to the right anymore
             }
             
         }

Please help someone :D

EDIT

Someone who can help me? I tried something, but it was nothing.