Dotnetnuke中的javascript还挺难的。
This type of functionality is made possible through the creation of our own custom Javascript Objects. The internet is full of examples explaining how to create Javascript Objects, complete with properties, methods, and events (to some extent), so if your new to them I suggest doing some research. Here are some examples.
http://www.webdevelopersjournal.com/articles/jsintro3/js_begin3.html
http://www.sitepoint.com/article/oriented-programming-1
