Why is my code not working

Hello. I recently created a JavaScript code to make my game work on Android but it does not do what I intended it to do. I have tried everything yet for some reason my code does not work! All I want is for the code to make my player move up or down depending on which half of the screen is pressed. Does anyone know what is wrong?

Code (JavaScript):

1. #pragma strict
2. var speed:float=15;
3. function Update () {
4. var touch : Touch;
5. if (Input.touchCount>1) {
6.     if (touch.position.y > Screen.width/2){
7.           GetComponent.<Rigidbody2D>().velocity.y = speed;
8.               }
9.     if (touch.position.y < Screen.width/2){  
10.               GetComponent.<Rigidbody2D>().velocity.y = speed*-1;
11.       }
12.     }
13.     else{
14.         GetComponent.<Rigidbody2D>().velocity.y=0;
15.     }
16. }

I tried to export the game to my Android phone, but whenever I tap the screen the player only moves down, never up. Does anyone know what is wrong?

I would really appreciate any help and thank you in advance if anyone knows how to fix this.

 

Not sure about UnityScript but in C# you need to address Input.GetTouch. See Unity reference below.

http://docs.unity3d.com/ScriptReference/Input.GetTouch.html

 

I'm not great with JavaScript but I don't see where you assign your touch variable to anything.

Trying to access touch.position.y probably returns null or 0, regardless of where you touch the screen.