My draggable function has broken

My draggable function has broken

Hi!
I had a draggable function and it was working nicely. But when I add NO-2 function, my draggabe function and my close button(button which included the div) broke down. Need help.

      HTML codes:

  1.       
  2. <div id="draggable" class="yeniyorum_div">
  3. <div class="yeniyorum_baslik">
  4. <span class="basliktext">Yeni yorum oluştur</span>
  5. <button class="closebutton" type="button" id="hideshow"  >&times;</button>
  6. </div>
  7. <form method="POST" action="javascript:void(0);" class="yorumform">
  8. <textarea name="yazilan_mesaj" class="yorumkutu_text" maxlength="140"></textarea><br />
  9. <input type="submit" onclick="kayitol();" class="yorumgonderbutton" value="Yayınla">
  10. </form>
  11. </div>

           
     NO-1: Draggable function:
  1. $(function() {    $( '#draggable' ).draggable({ containment: 'window' });
  2.  $( '#draggable' ).draggable({ handle: '.header'});
      
     NO-2: This function for post data without refresh the available page.
  1. function kayitol(){
  2. $('.yeniyorum_div, .arka_fon').hide()
  3. $('.yorum_basarili').fadeIn()
  4. $('.yorum_basarili').fadeOut(4000)
  5. var veriler = $('.yorumform').serialize(); 
  6. $.ajax({ 
  7. type: "POST", 
  8. url: "yorum_ekle.php", 
  9. data: veriler, 
  10. })};