Unity 3D javascript very simple mouse look script

// Performs a mouse look.

var horizontalSpeed : float = 2.0;
var verticalSpeed : float = 2.0;

var x : float = 0;
var y : float = 0;

function Update () {

    // Get the mouse delta. This is not in the range -1...1
    var h : float = horizontalSpeed * Input.GetAxis ("Mouse X");
    var v : float = verticalSpeed * Input.GetAxis ("Mouse Y");

    x = Mathf.Clamp(-30, 30, x+v );
    y = Mathf.Clamp(-90, 90, y+h );

    transform.rotation = Quaternion.Euler(x,y,0);

}