sql UPDATE coding

[raybrocks]

Hi. I am having som trubble. I want to update my database and i have the following code:

....

if ($submit) 
	submit($title,$message,$author);


function submit($title,$message,$author)
{ $date = gmdate("d.m.Y");
  $result = mysql_query("UPDATE sistenytt SET title = '$title', message = '$message', date = '$date', author = '$author' WHERE id = '$id'"); 
	if (!$result)
				echo "Error: The news was not updated";
	else			
		{ 
		include 'index.php';
		}  

	$submit = false;	
}

When i run the script i do not get up the error message, and the include index.php is launched, which should mean nothing went wrong with the query. But still the news is not updated when i check the database afterwords... What could be happening? I have testet the variables and its nothing wrong with them.
Any help would be appricieted!

Thanx

[djjjozsi]

from your code $id is missing, but you use $id inside a function.

....
if ($submit) 
	submit($title,$message,$author,$id);


function submit($title,$message,$author,$id)
{ $date = gmdate("d.m.Y");
  $result = mysql_query("UPDATE sistenytt SET title = '$title', message = '$message', date = '$date', author = '$author' WHERE id = '$id'"); 
...