function encodeURL(str) {
  var character = '';
  var unicode   = '';
  var string    = '';
  var i         = 0;

  for (i = 0; i < str.length; i++) {
    character = str.charAt(i);
    unicode   = str.charCodeAt(i);

    if (character == ' ') {
      string += '+';
    } else {
      if (unicode == 0x2a || unicode == 0x2d || unicode == 0x2e || unicode == 0x5f || ((unicode >= 0x30) && (unicode <= 0x39)) || ((unicode >= 0x41) && (unicode <= 0x5a)) || ((unicode >= 0x61) && (unicode <= 0x7a))) {
        string = string + character;
      } else {
        if ((unicode >= 0x0) && (unicode <= 0x7f)) {
          character   = '0' + unicode.toString(16);
          string += '%' + character.substr(character.length - 2);
        } else if (unicode > 0x1fffff) {
          string += '%' + (oxf0 + ((unicode & 0x1c0000) >> 18)).toString(16);
          string += '%' + (0x80 + ((unicode & 0x3f000) >> 12)).toString(16);
          string += '%' + (0x80 + ((unicode & 0xfc0) >> 6)).toString(16);
          string += '%' + (0x80 + (unicode & 0x3f)).toString(16);
        } else if (unicode > 0x7ff) {
          string += '%' + (0xe0 + ((unicode & 0xf000) >> 12)).toString(16);
          string += '%' + (0x80 + ((unicode & 0xfc0) >> 6)).toString(16);
          string += '%' + (0x80 + (unicode & 0x3f)).toString(16);
        } else {
          string += '%' + (0xc0 + ((unicode & 0x7c0) >> 6)).toString(16);
          string += '%' + (0x80 + (unicode & 0x3f)).toString(16);
        }
      }
    }
  }

  return string;
}

var args = '?user_id=050995301'
args += '&ref='+parent.document.referrer;
args += '&page='
args += '&monitor='+screen.width+'x'+screen.height;
args += '&title='+encodeURI(parent.document.title);
args += '&color='+(navigator.appName != "Netscape" ? screen.colorDepth : screen.pixelDepth);
args += '&cookie='+(navigator.cookieEnabled ? 1 : 2);
document.write('<img src="http://s1.gaccess.jp/bin/' + args + '" width="0" height="0" style="visibility:hidden;" > ');