Start executing jQuery function when I scroll to a specific [duplicate]

Answer 1

try this:

var div_top = $('#counter').offset().top;
$(window).scroll(function(){
 if($(window).scrollTop() > div_top){
     $({countNum: $('#counter').text()}).animate({countNum: 63  }, {
      duration: 3000,
      easing:'linear',
      step: function() {
        $('#counter').text(Math.floor(this.countNum));
      },
      complete: function() {
        $('#counter').text(this.countNum);

      }
    });
 }
});

it checks how far the div is (in px) from the top and how far you scrolled. and this gets cheched every time you scroll