/**
* Read the JavaScript cookies tutorial at:
* http://www.netspade.com/articles/javascript/cookies.xml
*/
/**
* Sets a Cookie with the given name and value.
* 创建cookie
* name Name of the cookie cookie的name
* value Value of the cookiecookie的值
* [expires] 过期时间,没有则关闭浏览器过期,如果想让一个cookie删除,则设置过期时间为过去的某一个时间即可
* [path] path="/www",设置了cookie能够被服务器里的www目录及子目录访问,这样通过path设置cookie共享的范围.如果设置cookie能够被服务器上所有的网页访问到,达到全局共享的目的,则可以改变path为path="/"
* [domain] 跨服务器共享.有多个网站分布在不同的服务器上,但他们属于同一个用户.例如,www.baihui.com.其办公网站office.baihui.com,其登陆网站ipassport.baihui.com.他们是统一用户,因此需要实现cookie共享.可以设置domain=".baihui.com"
* [secure] 是信息传输更加安全.secure=true,设置cookie只能在安全的Internet上连接.
*/
function setCookie(name, value, expires, path, domain, secure)
{
document.cookie= name + "=" + escape(value) +
((expires) ? "; expires=" + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "");
}
/**
* Gets the value of the specified cookie.
* 读取cookie
* name Name of the desired cookie.
*
* Returns a string containing value of specified cookie,
* or null if cookie does not exist.
*/
function getCookie(name)
{
var dc = document.cookie;
var prefix = name + "=";
var begin = dc.indexOf("; " + prefix);
if (begin == -1)
{
begin = dc.indexOf(prefix);
if (begin != 0) return null;
}
else
{
begin += 2;
}
var end = document.cookie.indexOf(";", begin);
if (end == -1)
{
end = dc.length;
}
return unescape(dc.substring(begin + prefix.length, end));
}
/**
* Deletes the specified cookie.
* 删除cookie
* name name of the cookie
* [path] path of the cookie (must be same as path used to create cookie)
* [domain] domain of the cookie (must be same as domain used to create cookie)
*/
function deleteCookie(name, path, domain)
{
if (getCookie(name))
{
document.cookie = name + "=" +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
"; expires=Thu, 01-Jan-70 00:00:01 GMT";
}
}
------------------------------------------------------------------------------------
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>cookies</title>
<script src="cookie.js"></script>
<script language="JavaScript">
<!--
var exp = new Date("December 31, 9998");
setCookie("COOKIE_MYNAME","Tom",exp,"/");
var myname = getCookie("COOKIE_MYNAME");
document.write("设置的名为COOKIE_MYNAME的cookies值为:"+myname + "<br>");
deleteCookie("COOKIE_MYNAME","/");
var newname = getCookie("COOKIE_MYNAME");
document.write("设置的名为COOKIE_MYNAME的cookies值为:"+newname);
//-->
</script>
</head>
<body>
</body>
</html>