for(i=0;i<url.length;i++) {
      if (okURIchars.indexOf(url.charAt(i))==-1 && url.charCodeAt(i)<256) {
        try{         

          if(charset == 'UTF-8' &&  url.charCodeAt(i)>128 ){
                str += utf8service.convertStringToUTF8(url.slice(i,i+2), charset,'false');
                i++;
          }
          else str += utf8service.convertStringToUTF8(url[i], charset,'false');

        }
        catch(err){
          return backup;
        }
      }
      else
        str += url[i]; 
    }

try
    {
          str = utf8service.convertStringToUTF8(url, charset,'false');
    }
    catch(err)
    {
          return backup;
    }
    return str;