Limit camera movement (please help)

Hi....

I will use this script to move Up/down camera....

Code (csharp):

1.  
2. public var minMaxZoomHeight : Vector2;
3. private var scrolled : int = 0;
4. var Orthographic : boolean = false;
5. var scrollspeed : int = 150;
6.  
7. function Update () {
8.    
9.    var mouseWheel : float = Input.GetAxis ("Zoom");
10.  
11.      if(mouseWheel != 0){
12.        if(mouseWheel > 0 && scrolled < minMaxZoomHeight.y){
13.          scrolled = mouseWheel + scrolled;
14.          transform.Translate(Vector3.up* Time.deltaTime * mouseWheel * scrollspeed);
15.        }
16.        else if(mouseWheel < 0 && scrolled > minMaxZoomHeight.x){
17.          scrolled = mouseWheel + scrolled;
18.          transform.Translate(Vector3.up * Time.deltaTime * mouseWheel * scrollspeed);
19.        }
20.      }
21.    }
22.  

how can put limits for the movement up/down ,please ?

 

Just don't apply the transform.Translate() if the height (transform.position.y) is greater than any given limit. Same for going down.