get page scroll position based on timer. Not scroll event.

scroll-timer.js

var didScroll = false;

$(window).scroll(function() {
    didScroll = true;
});

setInterval(function() {
    var winheight = $(window).scrollTop();
    var winheightdiff = $(window).height() - 65;

    if (!!didScroll) {
        didScroll = false;

        // Check your page position and then
        if (winheight > winheightdiff - 200) {
            // do something
        }
    }
}, 250);