Unity Camera Changing Error

Hello,
I am fairly new with unity and when coding a script to make the camera change from a view point to a first person perspective i came into some errors.

My first error was with a "camera killer" script which deactivated a camera and activated one. The code was written as:
function Start () {
"camera1".GameObject.active = true;
"FPSCamera".GameObject.active = false;

}
The error code for the object was: "NullReferenceException: Object reference not set to an instance of an object
Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.SetProperty (System.Object target, System.String name, System.Object value)
Camera_Killer.Start () (at Assets/Camera_Killer.js:2)"

My second error was with the camera changer. The code was written as:
function Update () {
if (Input.GetKey ("space"))
"camera1".GameObject.active = false;
"FPSCamera".GameObject.active = true;
}

The error code that came up was: NullReferenceException: "Object reference not set to an instance of an object
Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory)
Boo.Lang.Runtime.RuntimeServices.SetProperty (System.Object target, System.String name, System.Object value)
DIVE.Update () (at Assets/DIVE.js:5)"
I know these are simple erros but i have no idea how to fix them. If anyone could please help i would be greatley appreciated. Thank you.