Behavior to limit character length and value in a custom text field

[Scott Federman]

Hey all, 

I'm sure this is pretty easy but I'm pretty clueless with scripting. Could someone help me with a behavior that would only allow 2 characters and values of 0-25? Custom Field ID is 11850.

[Alejandro Conde Carrillo · Accepted solution]

According to the specification (RFC1738) the character '_' is not allowed in URLs:

Fully qualified domain names take the form as described in Section 3.5 of RFC 1034 [13] and Section 2.1 of RFC 1123

[5]: a sequence of domain labels separated by ".", each domain label starting and ending with an alphanumerical character and possibly also containing "-" characters. The rightmost domain label will never start with a digit, though, which syntactically distinguishes all domain names from the IP addresses.

You can replace the '_' by '-'.