venn diagram producer

think before you code...something i'm quickly learning isn't such a bad mantra.... so before i and others jump into this, maxim, rasmus, and anyone else following this thread/interested in it, i agree that scoping the script to a max of 3 terms is a necessary choice...any other comments/thoughts on this? go for OO? how to deal with parens, etc...just finished a parser in c++ and would like to avoid any sort of text parsing... thought i'd see others thoughts before hacking away jack