Jump & Animation Script 2D

Hi everyone, I'm having problems with my script for my player, the Jump section to be more specific... The problem is that it never reachs the IF statement inside the jump section. If I use the print inside Jump, it'll always prints true, but if I check it outside that part, it works just fine :S please help!

 public class Player : MonoBehaviour{
 
  public float playerSpeedX;
  private bool facingLeft;
  private bool onGround;
  private bool attacking;
  private bool jumping;
  
  private float direction;
  private float gravity;
  
  private static exSpriteAnimation player;
  private Vector3 moveDirection = Vector3.zero;
  public float jumpHeight;
  
  
  void Start (){
  player = GetComponent();
  playerSpeedX = 100f;
  jumpHeight = 40f;
  gravity = 25f;
  facingLeft = false;
  attacking = false;
  jumping = false;
  }
  
  void Update (){
  CharacterController controller = GetComponent();
  onGround = controller.isGrounded;
  
  // Amount to move
  float amtToMoveX = 0;
  
  // Move the player
  if(!attacking && onGround){
  //Move section, no problems here (I use Translate, btw)}
  
  // Attack
  if( Input.GetKeyDown(KeyCode.LeftControl) && onGround){ 
  //Attack section, no problems here}
  
  
  // Jump
  if(Input.GetKey(KeyCode.Space) && onGround)
  { 
  if(!onGround && (player.IsPlaying("playerStand") || player.IsPlaying("playerRun")))
  {
  player.Pause();
  player.Play("playerJump");
  print ("Hi");
  }
  moveDirection.y = jumpHeight;
  print ("onGround: "+onGround); //ALWAYS TRUE
  }
  
  // Stand
  if( onGround && (player.GetCurrentAnimation() == null) || (player.IsPlaying("playerJump")))
  {
  player.Play("playerStand");
  attacking = false;
  jumping = false;
  }
  
  // Apply gravity
  moveDirection.y -= gravity * Time.deltaTime;
     
  // Move the controller
  controller.Move(moveDirection * Time.deltaTime);
  print ("onGround: "+onGround); //WORKS!
  }}

I hope someone can help me with this. Thanks in advance!