input field validation

From: Date: Sun, 11 May 2008 05:48:30 +0000
Subject: input field validation
Groups: php.db 
Request: Send a blank email to php-db+get-44974@lists.php.net to get a copy of this message
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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