weapon system script

hi there, i am trying to script a weapon system were i have different weapons and can switch between them. i added ammo too. but every time i want to test it the programm automaticly changes into the pause mode and i can't restart -.-

please help me!

here is my script:

var projectil1:Transform; //Prefab for the projectil of weapon 1 var projectil2:Transform; //Prefab for the projectil of weapon 2 var power1 = 2000; var power2 = 2000; var FireButton = "f"; //Keyboard key used to shoot var ammo_typ1 = 20; //Ammo for weapon 1 var ammo_typ2 = 3; //Ammo for weapon 2 var weapon = 1; //wich weapon is in use var TotalWeaponNumbers = 2; //how many weapons exists in the game

function Update () { print (weapon);

//change weapon: if(Input.GetKeyDown("e")) { if(weapon TotalWeaponNumbers) {weapon = 1;} if(weapon < 1) {weapon = TotalWeaponNumbers;}

//weapons: //weapon 1 if(Input.GetKeyDown(FireButton)) { if(weapon == 1) { if(ammo_typ1>0){ var bullit1 = Instantiate(projectil1, GameObject.Find("spawnpoint").transform.position, Quaternion.identity); bullit1.rigidbody.AddForce(transform.forward*power1); ammo_typ1 -=1; }}}

//weapon 2
if(weapon ==2)
{if(ammo_typ2>0){
var bullit2 = Instantiate(projectil, GameObject.Find("spawnpoint").transform.position, Quaternion.identity);
    bullit2.rigidbody.AddForce(transform.forward*power2);
ammo_typ2 -=1;
}}}