监控页面滑到底部加载事件的jq

$(window).scroll(function () {
    var scrollTop = $(this).scrollTop();
    //console.log(scrollTop);
    var scrollHeight = $(document).height();
    //console.log('['+scrollHeight+']');
    var windowHeight = screen.availHeight;
    //console.log('【'+windowHeight+'】');
    if (scrollTop+ windowHeight >= scrollHeight) {
        if (stop == true && ipage <= totalPage) {
            stop = false;
            getMore();
        } else {
            $("#noMoreData").show();
        }
    }
});