code

app.js

var main = function(){
   $('.article').click(function() {
      $('.article').removeClass('current');
      $('.description').hide();
      
      $(this).addClass('current');
      $(this).children('.description').show();
    }); 
    
    $(document).keypress(function(event){
        if(event.which === 111) {
            $('.current').children('.description').toggle();
        }  
    });
};


$(document).ready(main);