Inline Modal Window question

I'm using the great script Inline Modal Window from http://www.sohtanaka.com/web-design/inline-modal-window-w-css-and-开发者_C百科jquery/.

When I use an form in the Window and click submit the window is closed. How can I prevent this?

<input type="submit" value="Submit" onclick="return false;" />

I dont know how to help you. You must be a little more specific.