switching between 2 states

 private var change: int = 0;
 
 function Start () {
 
 }
 
 function Update () {
 
     Debug.Log (change);
 
 if(Input.GetButtonDown("Jump"))
 {

 
     if (change < 1)change ++;
     else change = 0;
 }
 
 if (change == 0){
 
     if(tag=="Black")renderer.enabled = false;
     if(tag=="White")renderer.enabled = true;
 
         }
 if (change == 1)
 {
     if(tag=="Black")renderer.enabled = true;
     if(tag=="White")renderer.enabled = false;
 
     }
 }

What I am trying to do is have a player switch between two different sets of platforms on the press of the space bar. The problem I have is the collider is still there when the platform render is off. What I think I need to do is turn the gameobjects on and off from a separate gameobject.