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Validating TextBox for accepting character only

4 New Member
hi dear

i am having a textbox in which a user must prvoide the three character long code. how to make validation for this textbox to accept only letter between a-z and A-Z. i am working in asp.net using c# and i need to do this using javascript.

please provide your support.

regards
vishal sharma
Sep 26 '06 #1
2 9304
r035198x
13,262 MVP
hi dear

i am having a textbox in which a user must prvoide the three character long code. how to make validation for this textbox to accept only letter between a-z and A-Z. i am working in asp.net using c# and i need to do this using javascript.

please provide your support.

regards
vishal sharma
And again I have to write,
Use regular expressions
Sep 26 '06 #2
ronverdonk
4,258 Recognized Expert Specialist
You can do this in JS in2 ways:

1. check wile you are typing. In this case each keypress is checked for the character typed and that the length of the field is not exceeded.

2. check AFTER the field has been filled in and it is checked for content and length.

You can always define your html <input> statement with a MAXLENGTH="3" attribute of course.

Ronald :cool:
Sep 26 '06 #3

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