Weapon script

Hi, I have 4 weapons child to my weapon camera, I have a pick up script, 1st one below, then the weapon change script, 2nd one below, what I'm trying to do is only allow weapons to appear that the player has picked up by checking GlobalVars.js

I've been trying for hours with mixed results, any help would be appreciated, thanks.

 function OnTriggerEnter (other : Collider){
     
 if(other.gameObject.tag == "Player"){
     
     if(transform.tag == "Hand Gun"){
     globalVars.GetComponent(GlobalVars).haveHandGun = true;
     }else if(transform.tag == "M16"){
     globalVars.GetComponent(GlobalVars).haveM16 = true;
     }else if(transform.tag == "PPSH41"){                    // Set the weapons to true in GlobalVars.js when picked up
     globalVars.GetComponent(GlobalVars).havePPSH41 = true;
     }else if(transform.tag == "Bazooka"){
     globalVars.GetComponent(GlobalVars).haveBazooka = true;
         }
     }
 }

 function changeWeapon(){
 
     selectedWeapon++;
     if(selectedWeapon == Camera.main.transform.childCount){
           selectedWeapon = 0;
     }
 
     SelectWeapon (selectedWeapon); // Call the seletedWeapon function()
 }
 
 // Select another weapon
 function SelectWeapon (index : int){
 
     for (var i=0;i<Camera.main.transform.childCount;i++)    
     {
         if (i == index){
         
         Camera.main.transform.GetChild(i).gameObject.SetActive(true);
         
 // Set the currentWeappon var in GlobalVars to the Weapon being used
         globalVars.GetComponent(GlobalVars).currentWeapon = Camera.main.transform.GetChild(i).transform;
     }
     else
     {
         Camera.main.transform.GetChild(i).gameObject.SetActive(false);
         
         }
     }
 }