Put axises / emulate keys on texture buttons?

Hello, so here's my script for geared car on phone. I wonder why i am not getting any reaction when i try to press the up texture button. Am i even close to understand how to put axises in to button.

It'd be awesome if you can find me the answer!! :)

 var enginePower=150.0;
  var up : GUITexture;
  var Magni : float;
  
  private var axisH: float = 0; 
  private var axisV: float = 0;
   
   function InputGetAxis(axis: String): float {
   
       var v = Input.GetAxis(axis);
       if (Mathf.Abs(v) > 0.005) return v;
       if (axis=="Horizontal") return axisH;
       if (axis=="Vertical") return axisV;
       
   }
          
  function Start(){
  axisV = axisH = 0;
  } 
  
  function Update () {
  
  for (var touch : Touch in Input.touches){ 
  
  if(touch.phase == TouchPhase.Stationary && up.HitTest (touch.position)){
      if (Magni >= 0){
          axisH = 1 * enginePower * Time.deltaTime * 600.0;
       }
      if (Magni > 50){
          axisH = 1 * enginePower * Time.deltaTime * 250.0;
       } 
          if (Magni > 100){
          axisH = 1 * enginePower * Time.deltaTime * 100.0;
       } 
              if (Magni > 110){
          axisH = 1 * enginePower * Time.deltaTime * 80.0;
       }
               if (Magni > 130){
          axisH= 1 * enginePower * Time.deltaTime * 30.0;
       } 
          }
  }
  
  }