If you want "any string" then use /.+/
as the regex or </c>/.*/</c> if you want "any string, including the empty string". Of course that is very much the same as "anything goes" so one wonders why you even bother to check it.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
My blog: Imperial Deltronics