jQuery plugin: add .serializeObject() method to jQuery

jQuery.plugin.serializeObject.js

// jQuery plugin: add .serializeObject() method to jQuery
// at this moment (jQuery v1.7.2) where no such method in core
// this method serializes a form into an (arguably more useful) object
(function($,undefined) {
    $.fn.serializeObject = function() {
        var obj = {};
        $.each( this.serializeArray(), function(i,o) {
            obj[o.name] = obj[o.name] === undefined ? o.value :
                $.isArray( obj[o.name] ) ? obj[o.name].concat( o.value ) :
                [ obj[o.name], o.value ];
        });
        return obj;
    };
})(jQuery);