Mobile Infinite Scroll

$(document).ready(function() {

    /* Bind the touchevent (if touch events exist)
    -------------------------------------------------------------- */

    if (Modernizr.touch) $(document).bind('mouseup touchend', mobileInfscr);


    /* Infinite Scroll
    -------------------------------------------------------------- */

    $('#article-grid').infinitescroll({
        navSelector: '#page-nav',
        nextSelector: '#page-nav a',
        itemSelector: 'div.article',
        loadingText: 'Loading the next page',
        loadingMsgRevealSpeed : 0,
        animate: false,
        extraScrollPx: 0,
        donetext: 'No more pages to load',
        bufferPx: 80,
        debug: false
    });


    /* Event fired on touchevent
    -------------------------------------------------------------- */

    function mobileInfscr() {

        setTimeout(function() {
            var documentHeight = $(document).height();
            var scrollHeight = $(window).scrollTop();
            var distanceLeft = documentHeight - scrollHeight;

            if (distanceLeft < 500) {
                $(document).trigger('retrieve.infscr');
            }
        }, 400)

    };

});