gistfile1.js

$(".animate_bottom_top, .animate_top_bottom, .animate_left_right, .animate_right_left,.animate_fade").waypoint(function () {
 if (!$(this).hasClass("animate_go")) {
 var e = $(this);
 setTimeout(function () {
 e.addClass("animate_go")
 }, 30)
 }
 }, {
 offset: "80%"
});