4.3 2D (Need help with Animator in java)

I'm making a 2D Game, and I need help on how to Animation my Player Sprite, so far I made a few Animation for him and set up his animator. What I need help with is how to play the animation. and get the Speed from the Parameters in the animator to equal my var Speed.

So far here my code

 #pragma strict
 
 var Speed : float = 10;
 var anim : Animator;
 
 function Start () {
 anim = gameObject.GetComponment(Animator);
 }