Problem wit UPDATE query syntax

[Lubomir Mravec]

Hai All.
I'am problem with sql UPDATE syntax.

This is select query - is ok.

$menu = $HTTP_GET_VARS["menu"];
$link = mysql_connect('localhost', 'db', 'password')
or die('Could not connect: ' . mysql_error());

mysql_select_db('db') or die('Could not select database: '. mysql_error());

$query_d = 'SELECT obsah FROM ' . mysql_real_escape_string($menu) . ' WHERE id = 1';
$results_d = mysql_query($query_d) or die(mysql_error());
while ($row_d = mysql_fetch_array($results_d))
//echo $row_d["obsah"];
mysql_free_result($results_d);
mysql_Close();
------------------------------------------------------------------------

Problem is UPDATE.
I'am send multiline form.

$clanok = ($_POST['body']);
$menu = $HTTP_GET_VARS["menu"];

$query_d = 'UPDATE obsah SET' . mysql_real_escape_string($menu) . = . $clanok . WHERE id = '1';
$results_d = mysql_query($query_d) or die(mysql_error());

$menu is table name, $clanok is values /send multiline form...
Please help.
Thanks....