ok Janusz, here where problem arise.

file: /includes/main.inc
line 230 - 231, this part of function js_compress($sJS)

    //remove comments
    $line = preg_replace("/\/\/(.*)/","",$line);

and file: /js/JsHttpRequest.js
line 463
       if (this.url.match(new RegExp('^([a-z]+://[^\\/]+)(.*)((:[0-9]*)+)', 'i'))) {

see after bold text.
this regex command will treated as remark, and removed after process in line 231 from file /includes/main.inc, like this:
if (this.url.match(new RegExp('^([a-z]+:

i think i've found bug,on javascript function,prevent normal operation.
first,
frontaccount\includes\ui\ui_view.inc
line 1102 - 1103
replace code:
          table += \"<td><a class='\"+css_class+\"' href=\\\'javascript:setCCDate(\"+currentYear+\",\"+currentMonth+\",\"+dayOfMonth+\")\\\'>\"+dayOfMonth+\"</a></td>\";
          dayOfMonth++;

second,
javascript compressor malfunction(?), using file xajaxCompress.php from xajaxproject.org
temporary,disable js_compress function in:
frontaccount\includes\main.inc
function cache_js_file($fpath, $text)
{
    global $go_debug;
           //disable javascript compress
    //if(!$go_debug) $text = js_compress($text);

        $file = fopen($fpath, 'w');
    if (!$file) return false;
    if (!fwrite($file, $text)) return false;
    return fclose($file);
}