js中的cookie操作详解编程语言

cookie指某些网站为了辨别用户身份、进行session跟踪而储存在用户本地终端上的数据（通常经过加密）

在网站客户端中保存数据，可以减少服务器的压力

// Cookie操作对象 

var Cookies = {}; 

// cookie设置 

Cookies.set = function(name, value){ 

 var argv = arguments; 

 var argc = arguments.length; 

 var expires = (argc 2) ? argv[2] : null; 

 var path = (argc 3) ? argv[3] : /; 

 var domain = (argc 4) ? argv[4] : null; 

 var secure = (argc 5) ? argv[5] : false; 

 document.cookie = name + "=" + escape (value) + 

 ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + 

 ((path == null) ? "" : ("; path=" + path)) + 

 ((domain == null) ? "" : ("; domain=" + domain)) + 

 ((secure == true) ? "; secure" : ""); // secure值为true时，在http中是无效的；在https中才有效 

// cookie获取 

Cookies.get = function(name){ 

 var arg = name + "="; 

 var alen = arg.length; 

 var clen = document.cookie.length; 

 var i = 0; 

 var j = 0; 

 while(i clen){ 

 j = i + alen; 

 if (document.cookie.substring(i, j) == arg) 

 return Cookies.getCookieVal(j); 

 i = document.cookie.indexOf(" ", i) + 1; 

 if(i == 0) 

 break; 

 return null; 

// cookie删除 

Cookies.del = function(name) { 

 if(Cookies.get(name)){ 

 var expdate = new Date(); 

 expdate.setTime(expdate.getTime() - (86400 * 1000 * 1)); 

 Cookies.set(name, "", expdate); 

};

来自：
js中的cookie操作

9993.html