function isScrolledIntoView(elem) {
        var docViewTop = $(window).scrollTop();
        var docViewBottom = docViewTop + $(window).height();

        var elemTop = $(elem).offset().top;
        var elemBottom = elemTop + $(elem).height();

        return ((elemBottom <= docViewBottom) && (elemTop >= docViewTop));
    }

    $(window).scroll(function(){

        if (isScrolledIntoView('.fadeIn') === true) {
            $('.fadeIn').addClass('in-view')
        }

    });