Thanks. This is what I wanted.

soichi

2012/1/4 Juanma Barranquero <lekktu@gmail.com>

> > Is there any Emacs built-in function that returns the index of an
> element of
> > a list?
>
> If you don't mind using the CL package (included with Emacs), the
> function you want is `position'
>
>  (position "banana" '("apple" "banana" "orange") :test 'string=)   =>  1
>
>     Juanma
>