$.fn.serializeObject = function()
{ //Prepping for JSON
   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 o;
};

http://tobiascohen.com/files/stackoverflow/jquery-form-serializeObject.html

usage; $.toJSON($(\'form\').serializeObject());

Serialize Form to JSON

form, data, object, json

jQuery