I'd add a url parameter to the failed redirect for the Server Validations.. so that if the validations fail it goes to your page like: addnews.php?valid=false
Then you can look for that url parameter when determining what value to default like this:
value=""<?php echo(isset($_GET['valid'])?ValidatedField("addnews_166","formTITLE"):$rsEDITNEWS->getColumnVal("njstitle")) ?>