How do I call a script or a function to be active 'while'a GUITexture is displayed?

I must start by apologising the lack of convention within my script. I have never studied any programming language and I am trying to teach myself the basics of UnityScript.

What I have is a function called Freeze which disables character movement and mouse look scripts.

This works perfectly when combining a RaycastHit with a GetKey. This then displays a button that can be clicked which on doing so displays the GUITexture.

What I need is for the Freeze function to be called while the GUITexture is onscreen, preventing any inadvertent movement of the character.

Here is my script so far.

 #pragma strict
 
 function Freeze(){
 
 Screen.showCursor = true;
 
 var ml = GameObject.Find("Main Camera");
 
 GetComponent(MouseLook).enabled = false;
 
 ml.GetComponentInChildren(MouseLook).enabled = false;
 
 GetComponent(FPSInputController).enabled = false;
 
 GetComponent(CharacterMotor).enabled = false;
 }
 
 
 function UnFreeze(){
 
 var ml = GameObject.Find("Main Camera");
 
 Screen.showCursor = false;
 
 GetComponent(MouseLook).enabled = true;
 
 ml.GetComponentInChildren(MouseLook).enabled = true;
 
 GetComponent(FPSInputController).enabled = true;
 
 GetComponent(CharacterMotor).enabled = true;
 }
 
 
 function OnGUI(){
 
 var go = GameObject.Find("InfoScreen");
 
 go.GetComponent(MyGUI).enabled = true;
 }
 
 
 function offGUI () {
 
 var go = GameObject.Find("InfoScreen");
 
 go.GetComponent(MyGUI).enabled = false;
 }
 
 
 function Start () {}
 
 
 
 var linkToInfoBox : InfoBox;
 
 
 function Update () {
 
 var go = GameObject.Find("InfoScreen");
 
 Screen.showCursor = false;
 
 var ray : Ray = Camera.main.ViewportPointToRay(Vector3(0.5,0.5,0));       
       
 var Hit : RaycastHit;
 
 //var ray = Camera.main.ScreenPointToRay;//(Input.mousePosition);
 
 go.GetComponent(MyGUI).enabled = false;
 
 go.GetComponent(InfoBox).enabled = false;
 
 var texup = go.GetComponent(GUITexture).enabled;
 
 
 
 Debug.DrawRay(ray.origin, ray.direction * 5, Color.cyan);
 
 
 if(Input.GetKey(KeyCode.F))
 {
 Freeze();
 }
 else 
 {
 UnFreeze();
 }
 
                                                   
         for(Hit in Physics.RaycastAll(ray.origin, ray.direction, 5))
         {
     
             
                  if(Hit.transform.name == "BigTree")
                  {                      
                         OnGUI();
                         
                         Debug.DrawRay(ray.origin, ray.direction * 5, Color.red);
                         
                         
                         if((Hit.transform.name == "BigTree") && (Input.GetKey(KeyCode.E)))                        
                         {
                             Screen.showCursor = true;                            
                                                                                                                 
                             Freeze();
                             
                             go.GetComponent(InfoBox).enabled = true;    
                             
                             offGUI();    
                             
                             //linkToInfoBox.OnGUI ();
                             
                             }                        
                             else
                             {
                             UnFreeze();
                         }
                         
         
                             
                     //    GetComponent(Freeze).enabled = false;
                     //    tex.GetComponent(GUITexture).enabled = false;
                     //    }
                             
                     }
                 }                
 
         if (Input.GetMouseButtonDown(0))
         {
          go.GetComponent(GUITexture).enabled = false;         
         }
                         
 }          
                 

The InfoBox script is as follows

 #pragma strict
 
 var linkToInfoRaycast : InfoRaycast;
 
 
 
 function OnInfoGUI() 
 
 {
 
 var onTex = GetComponent(GUITexture).enabled;
 
 //var mygui = GetComponentInChildren(MyGUI).enabled;
 
 GUI.Label (Rect (400, 140, 300, 140), "Text");
 
 if (GUI.Button (Rect (400,300,150,50), "Click for information"))
 
         {
         GetComponent(GUITexture).enabled = true;
         
 
         GUI.Label(Rect(500, 300, 300, 40), "Click to exit");
         }
         
         
     }

I have tried using an If statement nested inside the button that says if ( GetComponent(GUITexture).enabled = true) but this does not work as I sure you are all well aware.

While loops caught my attention but I have not been able to set the conditions correctly for this either.

If anyone has an idea where I might be able to call the Freeze function while the GUITexture component is active I would be very grateful to hear.

Apologies again for the messy script.