Item Scripting Error

Assets/cube.js(27,45): BCE0044: expecting :, found '='.

     var details : boolean = false;
     var detaillistActive : boolean = false;
     var pickup : boolean = false;
     var dropdetails : boolean = false;
     var tunnelwidth = 500; 
     var tunnelheight = 200; 
     var tunnel1 = 100; 
     var tunnel2 = 30;
     var law = 500;
     var lah = 230;
     var size = 100;
     var size1 = 25;
     var pickw = 500;
     var pickh = 255;
     var picksize = 100;
     var picksize1 = 25;
     var Cube : gameObject;
  
         function OnGUI ()
         {
             if (details)
             {
                 
                    if (GUI.Button(Rect(tunnelwidth, tunnelheight, tunnel1, tunnel2), "Cube"));
                    {
                    //error is here
                    detaillistActive = !detaillistActive;
                    }
                    if(detaillistActive)
                    {
                    GUI.Box(Rect(law, lah, size, size1), "Cube");
                    if (GUI.Button(Rect(pickw, pickh, picksize, picksize1), "Pick-up"));
                    {
                    pickup = !pickup;
                    }
                    }
            }
            if(pickup)
            {
            (GUI.Button(Rect(100, 100, 75, 25),"Cube"));
            details = false;
            }
            if (pickup)
                {
                Destroy (Cube);
                }
           }
           
 
         
        function OnTriggerEnter(other : Collider)
        {
             if(other.tag == "Player")
             {
                 details = true;
             }
        }
  
        function OnTriggerExit(other: Collider)
        {
             if(other.tag == "Player")
             {
                 details = false;
             }
         }