how to avoid entering special characters

[Raaja Gotluru]

Hi,

how to avoid entering special characters in a text box. ie it should allow only alphanumeric characters.

Thanking you.

--raaja g

[Bear Bibeault]

When do you want to do the checking? What have you tried so far?

[Raaja Gotluru]

Hi,


I want to select a file through file option and the name of the file should not contain any special characters. This can be checked at the time of seletion or after submission both are valid.

Thanking you.

--raaja. g