Fall animation when character is falling

As far as my controller script is set up. When I press the jump key, the "Jump" animation plays. However, the "FallDown" animation plays immediately after and keeps playing until my character is grounded. I tried some adjustment with my scripts but had no luck.

1. I want my "Jump" animation to play then clamp on the last frame until I my y velocity is <= 0.

2. I want my "FallDown" animation to play when I start falling (y velocity < 0).

3. I'll add a "Land" animation latter, so I don't want the "FallDown" animation playing when my character is grounded.

Please feel free to add suggestions/solutions.

Here's the parts of my scripts that involve the jumping:

     //In air animations
     else
     {
         if(Input.GetButtonDown("Jump"))
         {
             animation.CrossFade("Jump");
             animation["Jump"].speed = 3;
         }
         
         if(!playerController.IsGrounded())
         {
             animation.CrossFade("FallDown", 0.5);
             animation["FallDown"].speed = 3;
         }
     }

(Controller)

 //Private, helper variables
 private var moveDirection = Vector3.zero;
 private var grounded : boolean = true;
 private var moveHorz = 0.0;
 private var normalHeight = 2.0;
 private var crouchHeight = 1.7;
 private var rotateDirection = Vector3.zero;
 
 private var isCrouching : boolean = false;
 private var isRunning : boolean = false;
 
 //Cache controller so we only have to find it once
 var controller : CharacterController;
     controller = GetComponent(CharacterController);
 var MoaliaStatus : Moalia_Status;
 MoaliaStatus = GetComponent(Moalia_Status);
 
 //Move the controller during the fixed frame updates
 function FixedUpdate()
 {
     if(!isControllable)
         Input.ResetInputAxes();
 
     else
     {
         if(grounded)
         {
             //Since we're touching something solid, such as the ground, allow movement
             //Calculate movement directly from input axes
             moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
             moveDirection = transform.TransformDirection(moveDirection);
             moveDirection *= walkSpeed;
             moveDirection.y -= gravity * Time.deltaTime;
             
             //Find rotation based upon axes if need to turn
             moveHorz = Input.GetAxis("Horizontal");
             if (moveHorz > 0)    //Right turn
                 rotateDirection = new Vector3(0, 1, 0);
             else if (moveHorz < 0)    //Left turn
                 rotateDirection = new Vector3(0, -1, 0);
             else    //not turning
                 rotateDirection = new Vector3(0, 0, 0);
             
             //Jump controls    
             if(Input.GetButton("Jump"))
             {
                 inair = true;
                 if(Input.GetButton("Run") && Input.GetButton("Jump"))
                 {
                     moveDirection.y = jumpSpeed/2;
                 }
                 else
                 {
                     moveDirection.y = jumpSpeed;
                 }
             }
             
             //Aplly any boosted speed
             if(Input.GetButton("Run") && Input.GetAxis("Vertical"))
             {
                 if(MoaliaStatus.stamina > 0)
                 {
                     isRunning = true;
                     if(MoaliaStatus)
                     {
                         moveDirection *= runSpeed;
                         MoaliaStatus.stamina -= MoaliaStatus.runUsage * Time.deltaTime;
                         isRunning = true;
                     }
                 }
                 else if(MoaliaStatus.stamina <= 0)
                 {
                     isRunning = false;
                 }
             }
             
             if(MoaliaStatus)
             {
                 if(MoaliaStatus.stamina <= MoaliaStatus.maxStamina)
                 {
                     MoaliaStatus.stamina += MoaliaStatus.staminaRecharge * Time.deltaTime;
                 }
             }
         }


 function IsGrounded()
 {
     return grounded;
 }