$(document).ready(function() {
        $("#footer").stickyFooter();
      });

      // sticky footer plugin
      (function($){
        var footer;
      
        $.fn.extend({
          stickyFooter: function(options) {
            footer = this;
            
            positionFooter();
      
            $(window)
              .scroll(positionFooter)
              .resize(positionFooter);
      
            function positionFooter() {
              var docHeight = $(document.body).height() - $("#sticky-footer-push").height();
              if(docHeight < $(window).height()){
                var diff = $(window).height() - docHeight;
                if (!$("#sticky-footer-push").length > 0) {
                  $(footer).before('<div id="sticky-footer-push"></div>');
                }
                $("#sticky-footer-push").height(diff);
              }
            }
          }
        });
      })(jQuery);