text: $(document).ready(function() {
      
      $('#toggle-livros').click(function(){
          activate('livros');
          deactivate('bio');
          return false;
      });
      
      $('#toggle-bio').click(function(){
          deactivate('livros');
          activate('bio');
          return false;
      });
  
  });
  
  function activate(section) {
      $('#' + section).show();
      buttonOn('#toggle-' + section);
  }
  
  function deactivate(section) {
      $('#' + section).hide();
      buttonOff('#toggle-' + section);
  }
  
  function buttonOn(id) {
      image = $(id + ' img:first-child');
      image.attr("src", image.attr("src").replace("_off", "_on"));
  }
  
  function buttonOff(id) {
      image = $(id + ' img:first-child');
      image.attr("src", image.attr("src").replace("_on", "_off"));
  }
  