$(document).ready(() => {
  $(window).on("resize", () => f.render());
  $(window).bind('mousewheel DOMMouseScroll MozMousePixelScroll', event => {
  	f.page = (event.originalEvent.wheelDelta / 120 > 0)?-1:1;
  });

  $("div#up").on("click", () => {
  	f.page = -1;
  });
  $("div#down").on("click", () => {
  	f.page = 1;
  });
});