function Gb2312ToUtf8(s1) {
  var s = escape(s1)
  var sa = s.split('%')
  var retV = ''
  if (sa[0] != '') {
    retV = sa[0]
  }
  for (var i = 1; i < sa.length; i++) {
    if (sa[i].substring(0, 1) == 'u') {
      retV += this.Hex2Utf8(this.Str2Hex(sa[i].substring(1, 5)))
      if (sa[i].length) {
        retV += sa[i].substring(5)
      }
    } else {
      retV += unescape('%' + sa[i])
      if (sa[i].length) {
        retV += sa[i].substring(5)
      }
    }
  }
  return retV
}
function Utf8ToGb2312(str1) {
  var substr = ''
  var a = ''
  var b = ''
  var c = ''
  var i = -1
  i = str1.indexOf('%')
  if (i == -1) {
    return str1
  }
  while (i != -1) {
    if (i < 3) {
      substr = substr + str1.substr(0, i - 1)
      str1 = str1.substr(i + 1, str1.length - i)
      a = str1.substr(0, 2)
      str1 = str1.substr(2, str1.length - 2)
      if (parseInt('0x' + a) & (0x80 == 0)) {
        substr = substr + String.fromCharCode(parseInt('0x' + a))
      } else if (parseInt('0x' + a) & (0xe0 == 0xc0)) {
        //two byte
        b = str1.substr(1, 2)
        str1 = str1.substr(3, str1.length - 3)
        var widechar = (parseInt('0x' + a) & 0x1f) << 6
        widechar = widechar | (parseInt('0x' + b) & 0x3f)
        substr = substr + String.fromCharCode(widechar)
      } else {
        b = str1.substr(1, 2)
        str1 = str1.substr(3, str1.length - 3)
        c = str1.substr(1, 2)
        str1 = str1.substr(3, str1.length - 3)
        var widechar = (parseInt('0x' + a) & 0x0f) << 12
        widechar = widechar | ((parseInt('0x' + b) & 0x3f) << 6)
        widechar = widechar | (parseInt('0x' + c) & 0x3f)
        substr = substr + String.fromCharCode(widechar)
      }
    } else {
      substr = substr + str1.substring(0, i)
      str1 = str1.substring(i)
    }
    i = str1.indexOf('%')
  }

  return substr + str1
}