var myTransform : Transform;
var speed = 0.1;
var onGround;
var Halfsize : double;
function Update () {
    var controller : CharacterController = GetComponent(CharacterController);

if(Input.GetKey(KeyCode.D)){
	 myTransform.position += myTransform.TransformDirection(Vector3.forward*speed);
}
if(Input.GetKey(KeyCode.A)){
	 myTransform.position -= myTransform.TransformDirection(Vector3.forward*speed);
}
if(Input.GetKey(KeyCode.W) && onGround){
	 myTransform.position += myTransform.TransformDirection(Vector3.up*speed);
}
}
   //Called every frame that a collider is touching another.
function OnCollisionStay(collision : Collision) {
	//Assume we're not on the ground
	onGround = false;
	//For all the points of contact in the collider
	for (var contact : ContactPoint in collision.contacts) {
		//Is one of the contact points near your feet?
		if(contact.point.y < myTransform.position.y - Halfsize) {
			//If so, then we must be on the ground!
			onGround = true;
		}
	}
}