Javascript validation: Block special characters

Question

How can I restrict users from entering special characters in the text box. I want only numbers and alphabets to be entered ( Typed / Pasted ).

Any samples?

Answer 1

Basically, just use an appropriate onkeypress handler. See http://www.qodo.co.uk/blog/javascript-restrict-keyboard-character-input/ and the example http://www.qodo.co.uk/wp-content/uploads/2008/05/javascript-restrict-keyboard-character-input.html