[hunchentoot-devel] Form Processing & responding to events

Lisp and Hunchentoot newbie here. I haven't been able to find an answer to the following question by searching the existing archives. I have a very substantial application written in PHP and MYSQL and would love to convert it over to Lisp using Hunchentoot and CL-SQL. My question is that I can't find anything to indicate how I can capture something like an onClick or an onLoad event using the keyword notation provided by Hunchentoot. I noticed from the test demo for the easy handler example that hitting the enter key while on a text box will cause the form to be submitted but I can't see where in the code this is explicitly called for.

Any clarification or assistance would be most appreciated.