Where to hack Calendar?

I’m using this plugin: http://n0id.hexium.net/?page_id=56 (Calendar v2.0) and it works, but the javascripts and stuff makes it not XHTML 1.0 compatible. I know that it works in the 3 major browsers (O, IE, FF) but I still have this thing about it being compliant and stuff.

Okay so where do i hack around the calendar.php to remove everything javascript and just leave it with a title= attribute so its completely compliant?