Anonymous

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /><title>Math</title></head><body><fieldset>	<legend>Do some math</legend>		<form action="math.php" method="POST">			<p><input type="text" name="fn" />&nbsp;&nbsp;<select name="select"><option>*</option><option>/</option><option>+</option><option>-</option></select>&nbsp;&nbsp;<input type="text" name="sn" /></p>			<p><input type="submit" name="action" value="send" /></p>		</form></fieldset><p><?php	if($_POST['action'] == 'send') {		$x = $_POST['fn'];		$s = $_POST['select'];		$a = $_POST['sn'];				$answer = $x . $s . $a;				echo("<div style=\"background: #FFFFF0; padding: 20px;\">$x $s $a = $answer</div>");	} else { if($_POST['action'] == 'send' && $x && $a == '') {			echo "you didn't enter anything in the inputs";			}		}?></p></body></html>