Изменение и удаление строк бд php

<?
$conect=mysql_connect("localhost","root","")or die(mysql_error());
mysql_select_db("doc");
 if(isset($_POST['update']))
{
$updat="UPDATE pacienti SET fio='$_POST[fio]',data='$_POST[data]',adres='$_POST[adres]',telefon='$_POST[telefon]' 
WHERE fio='$_POST[hidden]'";    
mysql_query($updat,$conect);
};
 if(isset($_POST['delete']))
{
$delet="DELETE FROM pacienti WHERE fio='$_POST[hidden]'";   
mysql_query($delet,$conect);
};
 $sql="Select * from pacienti";
 $mydat=mysql_query($sql,$conect);
 
 echo '<form action="vipiska.php" method="post">';
 
while($rec=mysql_fetch_array($mydat))
{ 
echo '<table width="100%" border="0" >';
echo '<tr>';
echo '<td class="tec">' . '&nbsp;' . '</td>';
echo '<td class="t2">'.'<input name=fio type=text  value='. $rec['fio'] . '></td>';
echo '<td class="tec">' . '&nbsp;' . '</td>';
echo '<td class="t3">'.'<input name=data type=text value='. $rec['data'] . '></td>';
echo '<td class="tec">' . '&nbsp;' . '</td>';
echo '<td class="t2">'.'<input name=adres type=text value='. $rec['adres'] . '></td>';
echo '<td class="tec">' . '&nbsp;' . '</td>';
echo '<td class="t3">'.'<input name=telefon type=text value='. $rec['telefon'] . '></td>';
echo '<td class="tec">'.'<input name=hidden type=hidden  value='. $rec['fio'] . '></td>';
echo ' '.'<td class="t3">'.'<input class="ok2" name=update type=submit value=Изменение>'.'    '.'<input class="ok2" name=delete type=submit value=Удалить>'.'</td><br>';
echo '</form>';
}
?>