Move the controller using CharacterController.move function.

SimpleMoveController.js

#pragma strict

var walkSpeed = 150;
var rotateSpeed = 100;
var jumpSpeed : float = 8.0;
var gravity : float = 20.0;

private var moveDirection : Vector3 = Vector3.zero;
 
function Update () {
	var controller : CharacterController = GetComponent.<CharacterController>();
	
	if (controller.isGrounded) {
		// We are grounded, so recalculate
		// move direction directly from axes
		moveDirection = Vector3(0, 0, Input.GetAxis("Vertical"));
		moveDirection = transform.TransformDirection(moveDirection);
		moveDirection *= walkSpeed * Time.deltaTime;
		
		//also with jump ;)
		if (Input.GetButton ("Jump")) {
			moveDirection.y = jumpSpeed;
		}
	}

	// Apply gravity 
	moveDirection.y -= gravity * Time.deltaTime;
	
	// Move the controller
	controller.Move(moveDirection * Time.deltaTime);
	
	// rotate controller
	var horizontalDir = parseFloat(Input.GetAxis("Horizontal") * rotateSpeed * Time.deltaTime);
	transform.Rotate(0, horizontalDir, 0);
}