Are you trying to accomplish this in a GUI or in 3D space?

The picking up of an item is in 3D space, with a script to destroy the object after it is used. But I cannot use OnMouseOver, because this looting method is already a function itself, and cannot be used within another function. Here is the code:

 #pragma strict
 
 var loot : ItemClass[];
 var Inventory : Inventory;
 
 function Start () {
 
 }
 
 function Update () {
 
 }
 
 function Giveloot() {
     
     for(var x = 0; x < loot.length; x++) {
         Inventory.playerInventory.Add(loot[x]);
     }
     
 }

And my Inventory Script:

 #pragma strict
 
 import System.Collections.Generic;
 
 var playerInventory : List.<ItemClass> = new List.<ItemClass>();
 var scrollView : Vector2;
 
 var equippedItem : ItemClass;
 var equipped : boolean = false;
 
 var playerHand : Transform;
 
 function Update () {
     if(equippedItem.itemType == ItemClass.ItemType.Weapon) {
         equipped = true;
     }
     else {
         equipped = false;
     }
 }
 
 function OnGUI() {
     //INVENTORY
     GUILayout.BeginArea(Rect(Screen.width - 500, 0, 500, 500));
     
     scrollView = GUILayout.BeginScrollView(scrollView, GUILayout.Width(500), GUILayout.Height(500));
     
     for(var x = 0; x < playerInventory.Count; x++) {
     
         GUILayout.BeginHorizontal();
         
         if(GUILayout.Button(playerInventory[x].icon) && playerInventory[x].itemType == ItemClass.ItemType.Weapon && equipped == false) {
         
             equippedItem = playerInventory[x];
             var weapon : Transform = Instantiate(playerInventory[x].itemPrefab, playerHand.position, Quaternion.identity);
             weapon.parent = playerHand;
             playerInventory.RemoveAt(x);
             return;
             
         }
         
         GUILayout.Box(playerInventory[x].name);
         GUILayout.EndHorizontal();
         
         GUILayout.Box(playerInventory[x].description);
         
     }
     
     GUILayout.EndScrollView();
     GUILayout.EndArea();
     
     
     //WEAPON SLOT
     
     if(GUI.Button(Rect(Screen.width / 2 - 25, Screen.height - 50, 50, 50), equippedItem.icon) && equipped == true) {
     
         playerInventory.Add(equippedItem);
         Destroy(GameObject.FindGameObjectWithTag("Weapon"));
         equippedItem = new ItemClass();
         
     }
 }

Hope this comes in any use to you guys.