Are you using FileMaker 10, if you are you can set the field in question to have a trigger of OnObjectKeystroke which runs a script checking teh number of characters in the field and moving the user on if it reaches the specified number.
Anything earlier I am not sure on how you could achieve this.
no - i'm still on FMP 8.1
You would need to use one of the script trigger plug-ins then.
> You would need to use one of the script trigger plug-ins then.
I think that it is not possibile even with a plugin, due to the fact that the calc executes on field exit.
The lonely way is to upgrade to 10.