echo 'Производитель<select id="man" name="Manuf_Name" class = "man">';
 
$sql=mysql_query("select * from `manufacturer` ");
 
while($result=mysql_fetch_array($sql)){
	print "<option value = $result[Manuf_Name]> $result[Manuf_Name]</option>";
 
 }
echo '</select>';

echo 'Модель <select name="sub_name">';
 
$sql=mysql_query("select `sub_name` from `mark` where `Manuf_Name` =  $manuf");
 
while($result1=mysql_fetch_array($sql)):
	// print "<option> $result1[sub_name]</option>";
 endwhile; 
 
 echo '</select>';