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Change your query to use the string concat operators to add them. ie. mysql_query("update users set approved='".$apv."' where sid='".$sid"."'");

Have you tried using Ajax to validate the input as the user types. Here is an example: http://jqueryfordesigners.com/demo/ajax-validation.php

Thread.sleep() paused the current thread, which is the calling thread to be more specific.