How to restrict a-z letters in itembind?

[Medusa]

As title said. In my bindatcmd i want the .@atcmd_numparameters have to be Item IDS, and because of that, i want it to not accept normal letters. Googled already but couldnt find anything. Hope for fast help, thank you

edit: found it, i need http://rathena.org/wiki/Charisalpha

Edited October 17, 2014 by Medusa

[Digos]

You could also use the atoi function http://rathena.org/wiki/Atoi