function checkAvaib() { var x=document.getElementById("form"); x.action="student_new.php"; x.target="_self"; x.submit(); }
<input type="text" name="user_id" id="user_id" maxlength="10" value="<?php echo $_REQUEST["user_id"];?>" önblur="checkAvaib()" tabindex="15"/> <input type="text" name="name" id="name" value="<?php echo $_REQUEST["name"];?>" tabindex="16"/>
var
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