Autocomplete - nevlozene polozky

$().ready(function() {
        $("#course").autocomplete("get_course_list.php", {
                width: 260,
                maxHeight: 500,
                matchContains: true,
                //mustMatch: true,
                //minChars: 0,
                //multiple: true,
                //highlight: false,
                //multipleSeparator: ",",
                selectFirst: false
        });
});

$q = strtolower($_GET["q"]);
if (!$q) return;

$sql = "select dgkod as course_name from diagnozy where dgkod LIKE '%$q%' ";//and skratka='$skratka'";
$rsd = mysql_query($sql);
while($rs = mysql_fetch_array($rsd)) {
$cname = $rs['course_name'];
echo "$cname\n";

}