Validating TextBox for accepting character only

[vishalsharma]

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

[r035198x]

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

[ronverdonk]

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: