Setting a Minimum Amount of Characters in a Numeric Field

Hello,

I would like to set a minimum and maximum amount of digits to a numeric field. I have used the following code in the change event (see below) to set the maximum, which is working for me, however I cant seem to set a minimum.

Is it possible to set a minimum, and if so, can someone please help?

var

maxLength = 6;

if(xfa.event.newText.length >maxLength)xfa.event.change = "";

Thank you,

Nik