Help. I do not know how to do when you hold the left shift is a character starts to run and release it when the form starts normally go. This is my script "Movement"

pragma strict

var animator: Animator;

var h: float;

var v: float;

function Start () {      

animator = GetComponent (Animator);

}

function Update () {                 

h = Input.GetAxis ('Horizontal');      

v = Input.GetAxis ('Vertical');          

if (Input.GetButton ('Jump'))          

animator.SetBool ('Jump', true);     

else         

animator.SetBool ('Jump', false);                           }

FixedUpdate function () {     

animator.SetFloat ('Speed​​', v);     

animator.SetFloat ('directrion', h);

}