Syntax:     DELIMPOS(str[,delims][,nth][,start])

Defn: A CI evaluator function that returns the index in
str of the nth delimeter beginning at start. The
default delims are a space, a comma, a semicolon, an
equals sign, left and right parentheses, left and
right brackets, single quote, double quote, and tab.
The default nth is 1; the default start is 1.

Type: Integer

Example: delimpos('file a=bb, old;rec=40,,f,ascii')
Result: 5