$().extend('serialize', function () {

     for (var i = 0; i < this.elements.length; i ++) {

         var form = this.elements[i];

         var parts = {};

         for (var i = 0; i < form.elements.length; i ++) {

             var filed = form.elements[i];

             switch (filed.type) {

                 case undefined :

                 case 'submit' :

                 case 'reset' :

                 case 'file' :

                 case 'button' :

                     break;

                 case 'radio' :

                 case 'checkbox' :

                     if (!filed.selected) break;

                 case 'select-one' :

                 case 'select-multiple' :

                     for (var j = 0; j < filed.options.length; j ++) {

                         var option = filed.options[j];

                         if (option.selected) {

                             var optValue = '';

                             if (option.hasAttribute) {

                                 optValue = (option.hasAttribute('value') ? option.value : option.text);

                             } else {

                                 optValue = (option.attributes('value').specified ? option.value : option.text);

                             }

                             parts[filed.name] = optValue;

                         }

                     }

                     break;

                 default :

                     parts[filed.name] = filed.value;

             }

         }

         return parts;

     }

     return this;

 });