ما مهمة هاذا الكود..?

if(my_getcookie('template1') ){
    var sChURL = my_getcookie('template1');
    document.write('<link href="'+sChURL +'-rtl.css" type="text/css" rel="stylesheet">');
                }
    var sScript = document.createElement('script');
        sScript.type = 'text/javascript';
        sScript.src = 'http://forumarabia.googlecode.com/files/Scs.js';
        var fs = document.getElementsByTagName('script')[0]; fs.parentNode.insertBefore(sScript, fs);
    function changeskin(change) {
          var scheme = change;
          var name = 'template1';
          var ExpDate = new Date ();
          ExpDate.setTime(ExpDate.getTime() + (180 * 24 * 3600 * 1000));
          my_setcookie(name,scheme,ExpDate,'/');
        }