somebigcontents

<div data-scrollpixel="testimonal">
//some html
</div>

some other contents

<div data-scrollpixel="footer">
//some html
</div>

$(window).scroll(function() {
   var hT = $('[data-scrollpixel]').offset().top,
       hH = $('[data-scrollpixel]').outerHeight(),
       wH = $(window).height(),
       wS = $(this).scrollTop();
   if (wS > (hT+hH-wH)){
$(this).data("scrollpixel");
   }
});