// JScript 文件
function encodeURL(str){

  var s0, i, s, u;

  s0 = "";           // encoded str

  for (i = 0; i < str.length; i++){   // scan the source

    s = str.charAt(i);

    u = str.charCodeAt(i);       // get unicode of the char

    if (s == " "){s0 += "+";}     // SP should be converted to "+"

    else {

        if ( u == 0x2a || u == 0x2d || u == 0x2e || u == 0x5f || ((u >= 0x30) && (u <= 0x39)) || ((u >= 0x41) && (u <= 0x5a)) || ((u >= 0x61) && (u <= 0x7a))){   // check for escape

          s0 = s0 + s;       // don't escape

        }

        else {               // escape

          if ((u >= 0x0) && (u <= 0x7f)){   // single byte format

            s = "0"+u.toString(16);

            s0 += "%"+ s.substr(s.length-2);

          }

          else if (u > 0x1fffff){   // quaternary byte format (extended)

            s0 += "%" + (oxf0 + ((u & 0x1c0000) >> 18)).toString(16);

            s0 += "%" + (0x80 + ((u & 0x3f000) >> 12)).toString(16);

            s0 += "%" + (0x80 + ((u & 0xfc0) >> 6)).toString(16);

            s0 += "%" + (0x80 + (u & 0x3f)).toString(16);

          }

          else if (u > 0x7ff){     // triple byte format

            s0 += "%" + (0xe0 + ((u & 0xf000) >> 12)).toString(16);

            s0 += "%" + (0x80 + ((u & 0xfc0) >> 6)).toString(16);

            s0 += "%" + (0x80 + (u & 0x3f)).toString(16);

          }

          else {               // double byte format

            s0 += "%" + (0xc0 + ((u & 0x7c0) >> 6)).toString(16);

            s0 += "%" + (0x80 + (u & 0x3f)).toString(16);

          }

        }

    }

  }

  return s0;

}