Integration

I have succeeded in triggering an event on a page written in C#, then passed parameters to a Javascript/Ajax function, passed the params to a C# function, back to a Javascript function and ended the program. Now I intend to do my cellular automata/evolutionary algorithm page in Ajax, getting data from the user via cookies, retrieving the data in the background processes, and drawing/retrieving a picture in the background processes. I need to find out how to draw a pic without opening a new window. I may perhaps use the UpdatePanel directive.