jquery 遍历 对象数组 有关问题

               var ddd = new Array();
                for (var i = 0; i < 10; i++) {
                    var aaa = new Object();
                    aaa.id = 'id_' + i;
                    aaa.val = 0;
                    ddd.push(item);
                }

                $.each(ddd, function(index, obj) {
                    if (obj.id == 'id_7');
                    {
                        obj.val = 10;
                    }
                    alert(obj.val);
                });