Suppose this is all in theTest.php
<?php
$strFilterByStatus = $_POST['byStatus'];
?>
<form id='testform" action="theTest.php" method="post">
<select name="byStatus" id="byStatus" onChange="frmAdminWorklist.submit()">
<option value="all">All</option>
<option value="recovered">Recovered</option>
<option value="unrecovered">Unrecovered</option>
</select>
<input type='submit' name='' value='Go test it'>
</form>
<?php
if ( $strFilterByStatus == 'all' )
{
$strSQL = "SELECT * FROM tblcase";
$SQL = mysql_query($strSQL);
}
?>