input field validation

[email protected] ("arafat uddin") Sun, 11 May 2008 11:48:30 +0600

Newsgroups	php.db
Message-ID	<[email protected]>

hi,
  i want to input only integer in my field.if without integer any
input put in the field it will show warning messege.
such as "12 "will be accept
but "12sds" will not accept .
"fhe34" will not accept


plz help me by any javascript code.

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