Basic JavaScript animation question

Hi guys-

I'm a real noob (never done a Java script before) and I'm trying to work out where I made some mistakes here in getting my animation to work.

Here is the code that I'm using...

 #pragma strict
 
 private var speed: float = 0.2f;
 static var anim: Animator;
 
 function Start () 
 {
 anim = gameObject.GetComponent (Animator);
 }
 
 function Update ()
 {
     if (Input.GetKey("space"))
     {
     anim.SetTrigger("jump");
     }
 {
      else if(Input.GetKey("left"))
 }
      this.transform.Rotate(Vector3.up, -1);
 }
         else if(Input.GetKey("right"))
 {
          this.transform.Rotate(Vector3.up, 1);
 }
         if(Input.GetKey("up"))
 {
          this.transform.position += this.transform.forward * speed;
         anim.SetBool ("isWalking", true);
 }
         else if(Input.GetKey("down"))
 {
          this.transform.position -= this.transform.forward * speed;
         anim.SetBool ("isWalking", true);
 }
         else if (Input.GetKeyUp("up") || Input.GetKeyUp ("down"))
 {
     anim.SetBool ("isWalking", false);
 }
 
 }

This are the errors I get...

And I got the instructions on the animation from this document:

http://files.holistic3d.com/Tutorials/CharacterController.pdf (pgs 11 & 12 of the pdf)

Any assistance you could give would be appreciated. I'm pretty stuck here.

Thanks!!!