Web项目，要求：保存用户名和密码在Cookie中，下次登录不再重新输入

设计一个实现登录功能的Web项目，要求：保存用户名和密码在Cookie中，下次登录不再重新输入

var cookie = {};
//设置 
cookie.SetCookies=function(name,value,exptime){ 
       try{ 
           if(arguments.length == 2) return arguments.callee(name,value,30*24*60*60*1000); 

           var exp　= new Date(); 
           exp.setTime(exp.getTime() + exptime); 
           document.cookie = name + "="+ escape(value) +";expires="+ exp.toGMTString(); 
       } 
       catch(e){ 
          throw new Error("SetCookies: " + e.message); 
           return false; 
       } 
   } 
//获取

cookie.GetCookies=function(name){ 
       try{ 
           var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)")); 
           if(arr != null)  
              return unescape(arr[2]);  
           return null; 
       } 
       catch(e){ 
            throw new Error("GetCookies: " + e.message); 
           return false; 
       } 
   }

//提交时函数头省略获取
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
cookie.SetCookies ("username",username);
cookie.SetCookies ("password",password);

//进入本页时  jquery 加载onload 别忘了导包
$(document).ready(function(){
    //可以判断下null值。
    document.getElementById('username').value = cookie.GetCookies("username");
    document.getElementById('password').value = cookie.GetCookies("password");
});