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]+: