! $Id: index,v 1.1 2001/12/07 16:54:13 toast Exp $
INDEX([^]charlist string)
  Returns the index of the first character in string that is listed in
  charlist.

  If charlist is prepended by a carat (^), then the index of the first
  character in string that is not listed in charlist is returned.

Examples:
  index(. filename.ext)		- Returns 8
  index(.e filename.ext)	- Returns 3
  index(^atcg ttacgatgaafgtat)	- Returns 10

See also:
  FUNCTIONS RINDEX
