因为要在地址栏里传中文参数，但是地址栏传中文参数是很危险的一件事情，我就用urlencode()转了下。

但是本以为JS的 encodeURI()能解码，但是很可惜不行，于是我找到了可以给PHP urlencode()生成的编码所对应的JS解码。 

  1. function urldecode(encodedString){
  2.     var output = encodedString;
  3.     var binVal, thisString;
  4.     var myregexp = /(%[^%]{2})/;
  5.     function utf8to16(str)
  6.     {
  7.         var out, i, len, c;
  8.         var char2, char3;
  9.  
  10.         out = "";
  11.         len = str.length;
  12.         i = 0;
  13.         while(i < len) 
  14.         {
  15.             c = str.charCodeAt(i++);
  16.             switch(c >> 4)
  17.             { 
  18.                 case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
  19.                 out += str.charAt(i-1);
  20.                 break;
  21.                 case 12: case 13:
  22.                 char2 = str.charCodeAt(i++);
  23.                 out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
  24.                 break;
  25.                 case 14:
  26.                 char2 = str.charCodeAt(i++);
  27.                 char3 = str.charCodeAt(i++);
  28.                 out += String.fromCharCode(((c & 0x0F) << 12) |
  29.                         ((char2 & 0x3F) << 6) |
  30.                         ((char3 & 0x3F) << 0));
  31.                 break;
  32.             }
  33.         }
  34.         return out;
  35.     }
  36.     while((match = myregexp.exec(output)) != null
  37.                 && match.length > 1
  38.                 && match[1] != '')
  39.     {
  40.         binVal = parseInt(match[1].substr(1),16);
  41.         thisString = String.fromCharCode(binVal);
  42.         output = output.replace(match[1], thisString);
  43.     }
  44.      
  45.     //output = utf8to16(output);
  46.     output = output.replace(/\\+/g, " ");
  47.     output = utf8to16(output);
  48.     return output;
  49. }