function setupDesign(theme) {
  $("#tab_nav").idTabs();
  $('.continue').click( function(){ 
                          $('a.selected').removeClass('selected');
                          var nextId = $(this).parents('.tab_content')
                            .hide()
                            .next('.tab_content')
                            .fadeIn('slow')
                            .attr('id');
                          $('a[href=#' + nextId + "]").addClass('selected');
                          return false;
                        });

}