Unexpected character in input:

WAT DOE IK FOUT ???


echo"
<form name='form' method='post' action='../contentbodyadmin/admin.php'>
$naam[$counter]
<input name='form' type='hidden' value='$counter'>
<input type='submit' name='submit' value='Bewerk'>
</form>
";

Ik krijg nl. deze melding:

Warning: Unexpected character in input: ' in /home/pappers/www/test/contentbodyadmin/jumpmenu.php on line 19