/// <summary>
/// 获取字符串字节长度
/// </summary>
/// <param name="dbHelper">字符串</param>
function mbStringLength(s) {
        var totalLength = 0;
        var i;
        var charCode;
        for (i = 0; i < s.length; i++) {
          charCode = s.charCodeAt(i);
          if (charCode < 0x007f) {
            totalLength = totalLength + 1;
          }  else if ((0x0080 <= charCode) && (charCode <= 0xffff)) {
            totalLength += 2;
          }
        }
        return totalLength;
      }