Client Side API documentation

I was trying to find the client side API documentation for sometime and finally i am able to get it at http://www.ibm.com/developerworks/websphere/library/specs/0608_wp6javadoc.html once on that page you can search for and download Portal V6.1 Web 2.0 Javadoc.

The .zip file has Java Doc style API documentation so unzip it and then start going through it, this is the screen shot of how the PortletWindow documentation