errore document.getElementById

[Ajeje Brazof]

Funziona tutto ma il browser mi segnala un errore alla riga:
document.getElementById('update_seconds').innerHTM L = results[4];

Da cosa potrebbe essere dato?
Il codice fa parte di uno script in ajax per un shoutbox/chat

    <script type="text/javascript">
    <!--
    var fieldname = 'chat';
    var last_time = 0;
    var xmlHttp = http_object();
    var last_id = {LAST_ID};
    var type = 'receive';
    var post_time = {TIME};
    var read_interval = 15000;
    var interval = setInterval('handle_send("read", last_id);', read_interval);

    function handle_send(mode, f)
    {
        if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
        {
            indicator_switch('on');
            type = 'receive';
            param = 'mode=' + mode;    
            param += '&last_id=' + last_id;
            param += '&last_time=' + last_time;            
            param += '&last_post=' + post_time;            
            param += '&read_interval=' + read_interval;            
    
            if (mode == 'add' && document.text.message.value != '')
            {
                type = 'send';
                for(var i = 0; i < f.elements.length; i++)
                { 
                    elem = f.elements[i]; 
                    param += '&' + elem.name + '=' + encodeURIComponent(elem.value); 
                }
                document.text.message.value = '';
            }
            else if (mode == 'delete')
            {
                type = 'delete';
                param += '&chat_id=' + f;
            }
            xmlHttp.open("POST", '{FILENAME}', true);
            xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            xmlHttp.onreadystatechange = handle_return;
            xmlHttp.send(param);
        }
    }
    
    function handle_return()
    {
        if (xmlHttp.readyState == 4)
        {
            if (type != 'delete')
            {
                results = xmlHttp.responseText.split('---');
                if (results[1])
                {
                    if (last_id == 0)
                    {
                        document.getElementById(fieldname).innerHTML = results[0];
                    }
                    else
                    {
                        document.getElementById(fieldname).innerHTML = results[0] + document.getElementById(fieldname).innerHTML;
                    }
                    last_id = results[1];
                    if (results[2])
                    {
                        document.getElementById('whois_online').innerHTML = results[2];
                        last_time = results[3];
                        if (results[4] != read_interval * 1000)
                        {
                            window.clearInterval(interval);
                            read_interval = results[4] * 1000;
                            interval = setInterval('handle_send("read", last_id);', read_interval);
                            document.getElementById('update_seconds').innerHTML = results[4];
                        }
                        post_time = results[5];
                    }
                }
            }
            indicator_switch('off');
        }
    }
    
    function delete_post(chatid)
    {
        document.getElementById('p' + chatid).style.display = 'none';
        handle_send('delete', chatid);
    }
    
    function indicator_switch(mode)
    {
        if(document.getElementById("act_indicator"))
        {
            var img = document.getElementById("act_indicator");    
            if(img.style.visibility == "hidden" && mode == 'on') 
            {
                img.style.visibility = "visible";
            }
            else if (mode == 'off')
            {
                img.style.visibility = "hidden"
            }    
        }
    }
    
    function http_object()
    {
        if (window.XMLHttpRequest)
        {
            return new XMLHttpRequest();
        }
        else if(window.ActiveXObject)
        {
            return new ActiveXObject("Microsoft.XMLHTTP");
        }
        else
        {
            document.getElementById('p_status').innerHTML = 'Status: Cound not create XmlHttpRequest Object.  Consider upgrading your browser.';
        }
    }
    -->
    </script>