I recently find it very difficult to find dependencies between different function attached to the form. Luckily, former colleague of mine has just released XrmToolbox for that – Webresource Dependecies Checker.
It give a nice tabular views of all the webresource link to a form, saving you tons of times to walkthrough all those javascript codes and finding which function triggered on which events.
Check out this page Check Webresource Dependencies on form (kmadd365.blogspot.com)
Aylwin Wong 