<style type="text/css">
#kol_embed_container {
  position:fixed;
  bottom:0px;
  right:0px;
}
</style>

<script type="text/javascript">
$('#kol_embed_container').hide();

$(window).scroll(function () {
  if ($(window).scrollTop() > $('body').height() / 2) {
    $('#kol_embed_container').slideDown('slow');
  }
  else {
    $('#kol_embed_container').slideUp('slow');
  }
});
</script>