1. JS自定義加密解密函式，及用法

function compile(code)  
{    
   var c=String.fromCharCode(code.charCodeAt(0)+code.length);  
   for(var i=1;i<code.length;i++){  
   c+=String.fromCharCode(code.charCodeAt(i)+code.charCodeAt(i-1));  
   }  
   return escape(c);  
}  

function uncompile(code)  
{  
   code
 
=unescape(code);  
   var c=String.fromCharCode(code.charCodeAt(0)-code.length);  
   for(var i=1;i<code.length;i++){  
   c+=String.fromCharCode(code.charCodeAt(i)-c.charCodeAt(i-1));  
   }  
   return c;  
}  

var str = "xxx''''中國人民解放軍'yyy'yyyyitjeff.3455559'";
var enStr = compile(str);
alert(enStr);
 
var deStr = uncompile(enStr);
alert(deStr);