$(document).ready(function() {
var windowHeight = $(window).height();
$(document).on('scroll', function() {
$('.myMouse, .go3, .go4, .go5, .go6, .go7, .go8, .gofooter').each(function() {
var self = $(this),
height = self.offset().top + self.height();
if ($(document).scrollTop() + windowHeight >= height) {
$('#box2, #box3, #box4, #box5, #box6, #box7, #box8, footer, .line_again').show()
}
});
});
});
И совсем коротко:
$(document).ready(function(){var o=$(window).height();$(document).on("scroll",function(){$(".myMouse, .go3, .go4, .go5, .go6, .go7, .go8, .gofooter").each(function(){var n=$(this),t=n.offset().top+n.height();$(document).scrollTop()+o>=t&&$("#box2, #box3, #box4, #box5, #box6, #box7, #box8, footer, .line_again").show()})})});