function tep_draw_button($title = null, $icon = null, $link = null, $priority = null, $params = null) {
    static $button_counter = 1;
    
    $types = array('submit', 'button', 'reset');
    
    if ( !isset($params['type']) ) {
      $params['type'] = 'submit';
    }
    if ( !in_array($params['type'], $types) ) {
      $params['type'] = 'submit';
    }

    if ( ($params['type'] == 'submit') && isset($link)) {
      $params['type'] = 'button';
    }

    if (!isset($priority)) {
      $priority = 'secondary';
    }
    
    // modification : attribution d'un id dans le tableau $params
    if (!isset($params['id'])){
     $idbutton = "tdb" . $button_counter . "";
    }else{
     $idbutton = $params['id'];
     $button_counter -= 1;
    }
    
    $button = '<span class="tdbLink">';

    if ( ($params['type'] == 'button') && isset($link)) {
      $button .= '<a id="' . $idbutton . '" href="' . $link . '"';
      
      if ( isset($params['newwindow']) ) {
        $button .= ' target="_blank"';
      }
      
    } else {

          $button .= '<button id="' . $idbutton . '" type="' . tep_output_string($params['type']) . '"';

    if ( isset($params['params']) ) {
      $button .= ' ' . $params['params'];
    }
    }
    
    $button .= '>' . $title;

    if ( ($params['type'] == 'button') && isset($link) ) {
      $button .= '</a>';
    } else {
      $button .= '</button>';
    }
    $button .= '</span><script type="text/javascript">$("#' . $idbutton . '").button(';

    $args = array();
    
    if ( isset($icon) ) {
      if ( !isset($params['iconpos']) ) {
        $params['iconpos'] = 'left';
      }

      if ( $params['iconpos'] == 'left' ) {
        $args[] = 'icons:{primary:"ui-icon-' . $icon . '"}';
      } else {
        $args[] = 'icons:{secondary:"ui-icon-' . $icon . '"}';
      }
    }
    
  
    if (empty($title)) {
      $args[] = 'text:false';
    }

    // modification : desactivation d'un bouton
    if ( isset($params['disabled']) ) {        
        $args[] = 'disabled: true';
        $activate = 'false';
    }

    
    if (!empty($args)) {
      $button .= '{' . implode(',', $args) . '}';
    }
    
    $button .= ').addClass("ui-priority-' . $priority . '").click(function() {return ' . $activate . ';}).parent().removeClass("tdbLink");</script>';

    $button_counter++;

    return $button;
  }