Input Field to follow and check for the following algorithm. Maximum 11 alpha-numeric characters:
1st to 4th characters => Alphabetic characters- no numbers and special characters.
5th characters => 0 (Just a single Zero)
6th to 11th Characters => Alpha-numeric.
I think my question is quite simple, i want to enter 11 characters in an input field but first 4 characters should be as defined in point 1 and 5th character should be 0 and 6th characters to onward alphanumeric . input field should allow to enter characters as i defined , if some one want to enter 1 or other character at 5ht positions input field should not allow because 5ht position is for 0 and same expressions for other positions.