[RESOLVED] how to check if at least one checkboxes is checked

[jimot]

hi all.. how can we check if at least one of the checkboxes in a form is checked?

Here is the problem, I have a form with checkboxes. If at least one of the boxes is checked, then there's no problem after I press the submit button (delete), but if no boxes are checked, then it gives me an error.

here's my code in the index.php:

print "<form action=delete.php><table>";

while (list($code, $url, $categori, $description) = mysql_fetch_row($result)):
   print "<tr><td><input type=checkbox name=item[$code] value=y>$description
   </td></tr>";
endwhile;

print "<tr><td><input type=submit value=Delete></td></tr>";
print "</table></form>"; 

and here's the code in delete.php:

while (list($key, $val) = each ($item)) :
   if ($val == "y"):
      $query = "DELETE FROM items WHERE code = $key";
      $result = mysql_query($query);
   endif;
endwhile; 

if none of the checkboxes is checked, then it gives this error:

Warning: Variable passed to each() is not an array or object in /home/www/dl.jimotman.com/index.php on line 100