example.js

someNameSpace = {
    //... 
    processForm: function (form) {
        return JSON.stringify(form.serializeObject(function (key, val) {
            return {
                name: key,
                value: encodeURIComponent(val)
            };
        }));
    }
    //...
};

jquery.serializeObject.js

$.fn.serializeObject = function(fn) {
  var o = {},
      a = this.serializeArray(),
      that;
  $.each(a, function() {
    that = this;
      if($.isFunction(fn)){
        that = fn(that.name, that.value);
      }
    if(o[this.name] !== undefined) {
      val = that.value || '';
      if(!o[that.name].push) {
        o[that.name] = [o[that.name]];
      }
      o[that.name].push(that.value);
    } else {
      o[that.name] = that.value;
    }
  });
  return o;
};

jquery.serializeObject.js is similar to $.serializeAray but it turns in the form data into a js object (which is easily converted to JSON by pasing it in to JSON.stringify())

A callback function is optional to all to manipulate/process the form data..
A typical usage would be to encodeURIComponent..