$(function(){
trigger_tech = $("li[data-technology]");
content_tech = $("section[data-technology]");

  trigger_tech.live('click', function(event){
    trigger_tech.removeClass('active');
    $(this).addClass('active');

    content_tech.addClass('visuallyhidden');
    tech = $(this).attr('data-technology');
    $('section[data-technology=' + tech + ']').removeClass('visuallyhidden');
    $(this).addClass('active');
  });

});