Package widget for syndication

Here's an overview of third-party JavaScript widgets: http://www.manning.com/vinegar/TPJS_meap_ch01.pdf

Here is how to work around the browser's same-domain-origin policy on AJAX requests to enable user interaction:
 - JSONP - in jQuery 1.5+? - $.get() using this syntax:

$.get(
                "http://domain.com/json.php?callback=?",
                function(data, textStatus){
                    $.each(data,
                        function(index, user){
                                $("#ulUsers").append($("<li></li>").text(user.name + " is " + user.age + " years old"));
                        }
                    );
                },
                "json"
);
- - JSONP requires the remote server to respond wrapping the JSON in a function call named after the "callback" URL parameter, like "function_name(JSON)". If the URL contains callback=?, jQuery creates an arbitrary callback function name, (injects a script tag to load the remote JSON,) executes the callback to get the data, (then removes the injected script tag.)