disabling a script when collide with a cube

Hi, i want to make an enemy behind a corner come out and follow you when you step on a cube. I have all the scripts but this one doesn’t work i dont know why
here’s my script:

function OnControllerColliderHit(hit:ControllerColliderHit) {

var script : EnemyAI;

var script : EnemyAttack;


if(hit.gameObject.tag == "Instantiate enemy")

	{
			GetComponent(EnemyAI).enabled = true;
			GetComponent(EnemyAttack).enabled = true;
	}

}

what should i do?
the enemy has EnemyAI and EnemyAttack disabled and when you step on a cube i want them to be enabled but i get 2 errors:

Assets/Scripts/Enable script.js(4,14): BCE0018: The name ‘EnemyAI’ does not denote a valid type (‘not found’). Did you mean ‘System.Enum’?

Assets/Scripts/Enable script.js(5,14): BCE0018: The name ‘EnemyAttack’ does not denote a valid type (‘not found’).

Leave this script where it is and move your two C# scripts (EnemyAI, EnemyAttack) under a folder named: “Plugins” - create one if it does not exist yet).

Take a look at this: Unity - Scripting API:

Unity compiles scripts in a certain order. So if you are ever trying to access C# from JavaScript or the other way around, you need to make sure you have them in the proper location. Either move your C# script to a folder called Plugins or move your JavaScript files to the Standard Assets folder.

Please cache the components…

var enemyAIScript : EnemyAI;
var enemyAttackScript : EnemyAttack;

function Start()
{
     enemyAIScript=gameObject.GetComponent.<EnemyAI>();
     enemyAttackScript=gameObject.GetComponent.<EnemyAttack>();
}
function OnControllerColliderHit(hit:ControllerColliderHit) 
{
if(hit.gameObject.tag == "Instantiate enemy")

    {
            enemyAIScript.enabled = true;
            enemyAttackScript.enabled = true;
    }

}