$(function () {
  
    var tabContainers = $('div.colboxtabs > div');
    var tabNavigation = $('div.colboxtabs ul.tabnavigation a');
    tabContainers.hide().eq(0).show();
    tabNavigation.eq(0).addClass('selected');
    tabNavigation.click(function () {
      tabContainers.hide().filter(this.hash).show(); 
      tabNavigation.removeClass('selected');
        $(this).addClass('selected');   
        return false;
    });
});