This answer is going to suck, and I apologize:
Ctrl Shift F. Search for the same function names, or the same classes/IDs if you think it has a different name/same function.
I find searching for function name,
.class to be the most productive. Also exclude .cs files from your search. This will minimize the time since the preceeding
. will only appear when using in jQuery, but it's still a very manual process.
I hope someone has a better solution here, and if they do I'll feel like an idiot, but I honestly could not find a better way in VS 2008 to do this.