Make a form data object

jQuery.serializeJSON.js

jQuery.fn.extend({
  serializeJSON: function () {
      var data = {};

      this.map(function () {
          var elements = jQuery.prop(this, "elements");
          return elements ? jQuery.makeArray(elements) : this;
      })
      .filter(function () {
          return this.name && !jQuery(this).is(":disabled");
      })
      .each(function () {
          data[this.name] = this.value;
      });

      return data;
  }
});