function toggle_advanced() {

  $('#search_categories').toggle('fast',function() {
  
    if ($('#advanced_toggle').html()=='Advanced') {
      $('#advanced_toggle').html('Advanced Off');
      $('[name=s_advanced]').val(1);
    } else {
      $('#search_categories input:checkbox').attr('checked', false); 
      $('#advanced_toggle').html('Advanced');    
      $('[name=s_advanced]').val(0);
    }
    
  });
}

function toggle_checkboxes() {

  if ($('[name=s_category_all]').attr('checked')) {
    $('#search_categories input:checkbox').attr('checked', true);
  } else {
    $('#search_categories input:checkbox').attr('checked', false);  
  }

}