$(function(){
  positionFooter();
  function positionFooter(){
    //if($(document).height() < $(window).height()){
      var y = ($(window).scrollTop()+$(window).height()-$(".bottom-edge").height());
      if (y<570) y=570;
      $(".bottom-edge").css({
        position: "absolute",
        top:y+"px"
      })//.animate({'top': y+'px'},'slow');
    //}
  }
  $(window).scroll(positionFooter)
           .resize(positionFooter);

});