jQuery sticky element

gistfile1

<style>
  #sticky.stick {
  position: fixed;
  top: 0;
  z-index: 99999999999;
}
</style>
<script>
function sticky_relocate() {
  var window_top = $(window).scrollTop();
  var div_top = $('#sticky-anchor').offset().top;
  if (window_top > div_top) {
    $('#sticky').addClass('stick');
  } else {
    $('#sticky').removeClass('stick');
  }
}

$(function() {
  $(window).scroll(sticky_relocate);
  sticky_relocate();
});
</script>