Camera switch problem

Hi~
I have a some problem of camera whitch.
Im created camera java script but…is not work.
error messege is → BCE0019: ‘enable’is not a member of’UnityEngine.Camera’

public var camsky : Camera;
public var camfirst : Camera;

function Update () {
//
if(Input.GetKey(KeyCode.F1))
{
camsky.camera.enable = true;
camfirst.camera.enable = false;

}

if(Input.GetKey(KeyCode.F2))
{
camsky.camera.enable = false;
camfirst.camera.enable = true;
}
}

Please help me!
thanks!

The variable is ‘enabled’ not ‘enable’.