Blokowanie Przycisku galeria php+javascryp+mysql Opcje

[zebrowski1073]

[HTML] pobierz, plaintext 
<div class="grid_12">
 <div class="module">
  <h2><span>Formularz</span></h2>
   <div class="module-body">
    <form>
     <div class="plupload_buttons" id="container">
      <div id="queue"></div>
      <input id="file_upload" name="file_upload" type="file" multiple="true" class="plupload_button plupload_add" style="position: relative; z-index: 1;">
     </div>
    </form>
 
    <div class="plupload_buttons" id="container">
      <a href="?id=gal&page=wgraj" class="plupload_button plupload_add" style="position: relative; z-index: 1;">Dalej</a>
    </div>
[HTML] pobierz, plaintext 

<

[JAVASCRIPT] pobierz, plaintext 
script type="text/javascript">
 <?php $timestamp = time();?>
   $(function() {
    $('#file_upload').uploadify({
    'formData'     : {
    'timestamp' : '<?php echo $timestamp;?>',
    'token'     : '<?php echo md5('unique_salt' . $timestamp);?>',
    'dir'       : '<?php echo $dir;?>'
    },
   'swf'      : '../lib/js/uploadify.swf',
   'uploader' : '../lib/upload.php'
   });
  });
</script>
[JAVASCRIPT] pobierz, plaintext 

[HTML] pobierz, plaintext 
</div>
 </div>
 
</div>
[HTML] pobierz, plaintext 

Chciałbym zablokować przycisk dalej do puki nie wgra się obrazków z komputera. Nie wiem jak to zrobić