Door opening with a key, my scripts and problem

So I have my door open script which is working great:

 var Range : boolean = false;
 var ThePlayer : Transform;
 var sound : AudioClip;
 var sound2 : AudioClip;
 var DoorClosed : boolean = true;
 var text : GUIText; // it shows on screen "Press mouse button to open/close the door"
 function Start () 
 {
  text.enabled = false;
 }
 function Update () 
 {
     var distance : float = Vector3.Distance (ThePlayer.transform.position, transform.position);
     if (distance < 3f)
     {
        Range = true;
     }
     else
     {
        Range = false;
     }
     if (Range == true)
     {
        text.enabled = true;
        if(Range == true && Input.GetMouseButtonDown(0) && DoorClosed == true)
        {
          animation.Play ("dooropen");
          DoorClosed = false;
          audio.PlayOneShot(sound);
        }
        else if (Range == true && Input.GetMouseButtonDown(0) && DoorClosed == false)
        {
          animation.Play ("doorclose");
          DoorClosed = true;
          audio.PlayOneShot(sound2);
        }
     }
     else if (Range == false)
     {
     text.enabled = false;
     }
 }

And my key script which works too:

 var Range : boolean = false;
 var ThePlayer : Transform;
 var text2 : GUIText;
 var GotKey : boolean = false;
 function Start () 
 {
  text2.enabled = false;
 }
 function Update () 
 {
     var distance : float = Vector3.Distance (ThePlayer.transform.position, transform.position);
     if (distance < 3f)
     {
        Range = true;
     }
     else
     {
        Range = false;
     }
     if(Range == true)
     {
        text2.enabled = true;
     }
        if(Range == true && Input.GetMouseButtonDown(0))
        {
        animation.Play ("key");
        GotKey = true;
        }
     else if(Range == false)
     {
        text2.enabled = false;
     }
 }

And my question is.. how to add needed key to a door script.