Scroll to element to active

Scroll_to_element.js

$(window).scroll(function(){
    var window_top = $(window).scrollTop();
    var div_top = $(".number_counter").offset().top + 50; // Change class .number_counter
    var window_height = $(window).height();
    if (window_top + window_height >= div_top) {
    	//Code here
    }
});