sample.js

$.fn.serializeJSON = function() {
                    var o = {};
                    var a = this.serializeArray();
                    $.each(a, function() {
                        if (o[this.name]) {
                            if (!o[this.name].push) {
                                o[this.name] = [o[this.name]];
                            }
                            o[this.name].push(this.value || '');
                        } else {
                            o[this.name] = this.value || '';
                        }
                    });
                    return JSON.parse(o);
                };