Door Open With Object Pickup

First of all, I'm assuming that the code for rotating the door works as intended?
I modified your code quite a bit, here is the finished result:

 // Smoothly open a door 
     var smooth = 2.0; 
     var DoorOpenAngle = 90.0; 
     var DoorCloseAngle = 0.0; 
     var inRange : boolean = null;
     var unlocked : boolean = false;
     var isOpen : boolean = false;
     var opening : boolean = false;
     
     var hasCrowBar : boolean = false; //Has to be changed from another script
     
     //Main function 
     function Update (){
         if(opening){ 
             var target = Quaternion.Euler (0, DoorOpenAngle, 0); 
             // Dampen towards the target rotation 
             transform.localRotation = Quaternion.Slerp(transform.localRotation, target, Time.deltaTime * smooth); 
         }
     
         if(!opening){ 
             var target1 = Quaternion.Euler (0, DoorCloseAngle, 0); 
             // Dampen towards the target rotation 
             transform.localRotation = Quaternion.Slerp(transform.localRotation, target1, Time.deltaTime * smooth); 
         }
         if(!isOpen) {
             if(inRange){ 
                 if(Input.GetKeyDown("e")){ 
                     if(unlocked) {
                         opening = !opening;
                     }
                     if(!unlocked) {
                         if(hasCrowBar) {
                             unlocked = true;
                             Debug.Log("You have unlocked the door!");
                         }
                         if(!hasCrowBar) {
                             Debug.Log("The door won't open, please find a crowbar");
                         }
                     } 
                 } 
             }
          }
     }
     
     //Activate the Main function when player is near the door 
     function OnTriggerEnter (other : Collider){
         if (other.gameObject.tag == "Player") { 
             inRange = true; 
         } 
     }
     
     //Deactivate the Main function when player is go away from door 
     function OnTriggerExit (other : Collider){
         if (other.gameObject.tag == "Player") { 
             inRange = false; 
         }
     }