var offset = 0;

    var $container = $('#container');

    var $firstRun = true;

​

    function load() {

      var tumblr = $.getJSON("http://polerstuff.tumblr.com/api/read/json?num=10&type=photo&start="+offset+"&callback=?",

      function(data) {  

         $.each(data.posts, function(i,item){            

            if($firstRun){

                $container.append('<img class="photo" src="'+this['photo-url-400']+'" />');

            } else {

              var $newItems = $('<img class="photo" src="'+this['photo-url-400']+'" />');

              $container.append( $newItems ).isotope( 'appended', $newItems );

            }

         });

      });

      tumblr.complete(function(){ 

        $container.isotope({

        // options

        layoutMode: 'masonry',

        itemSelector : '.photo'

       });

      });

      offset+=10;

      $firstRun = false;

    }

    $(window).load(function(){ 

    load();

            $container.isotope({

        // options

        layoutMode: 'masonry',

        itemSelector : '.photo'

    });

        $(window).scroll(function () {     

​

            var top = $(window).scrollTop();

            var bottom = $("#bot").height() + $("#bot").offset().top;

            var winHeight = window.innerHeight ? window.innerHeight : $(window).height();

            var winBot = top + winHeight;

            if (bottom  < winBot ) load().delay(800);

        });

    });