Array.prototype.shuffle = function() {
            var s = [];
            while (this.length) s.push(this.splice(Math.random() * this.length, 1)[0]);
            while (s.length) this.push(s.pop());
            return this;
        }

        function Numsort (a, b) { return a - b; }
        function calculateBoxes() {
            var res = $(document).width();
            var max_pics_per_row = 10;
            var boxes = new Array();
            var boxes_width = 0;

            for (var i = 1; i <= max_pics_per_row; i++) {
                var rand_width = getRandom(20, 200);
                boxes.push(rand_width);
                boxes_width += rand_width;
            }

            boxes.sort(Numsort);
            if (boxes_width > res) {
                var diff = boxes_width - res;
                boxes[boxes.length() - 1] -= diff;
            } else if (boxes_width < res) {
                var diff = (res - boxes_width) / 10;
                for(var i = 0; i < 10; i++) {
                    boxes[i] += diff;
                }
            }

            boxes.shuffle();
            return boxes;
        }
        function getRandom(min, max) {
            if(min > max) { return -1; }
            if(min == max) { return min; }
            var r;
            do { r = Math.random(); } while(r == 1.0);
            return min + parseInt(r * (max-min+1));
        }