js cookie

function JSCookie()
{
	this.GetCookie = function(key)
	{
		var value = document.cookie.match(new RegExp(";?"+key+"=([^;]*)","i"));
		return unescape(value?value[1]:"");
	};
	this.GetChild = function(cookiekey,childkey)
	{
		var child = this.GetCookie(cookiekey);
		var getvalue = child.match(new RegExp("&?"+childkey+"=([^&;]*)","i"));
		return unescape(getvalue?getvalue[1]:"");
	};
	this.SetCookie = function(key,value,expire,path)
	{
		var cookie = "";
		if(key && value) cookie += key + "=" + escape(value) + ";";
		if(expire) cookie += "expires=" + expire.toGMTString() + ";";
		if(path) cookie += "path=" + path + ";";
		document.cookie = cookie;
	};
	this.Expire = function(key)
	{
		expire_time = new Date();
		expire_time.setFullYear(expire_time.getFullYear() - 1);
		var cookie = " " + key + "=e;expires=" + expire_time + ";"
		document.cookie = cookie;
	}
}

 


用法：
一、设置cookie
var cookie = new JSCookie();
//普通设置
cookie.SetCookie("key1","val1");

//过期时间为一年
var expire_time = new Date();
expire_time.setFullYear(expire_time.getFullYear() + 1);
cookie.SetCookie("key2","val2",expire_time);

//设置路径，带过期时间
cookie.SetCookie("key3","val3",expire_time,"/");

//设置带子键的cookie,子键分别是k1,k2,k3
cookie.SetCookie("key4","k1=1&k2=2&k3=3");

二、读取cookie
//简单获取
cookie.GetCookie("key1");
cookie.GetCookie("key2");
cookie.GetCookie("key3");
cookie.GetCookie("key4");
//获取key4的子键k1值
cookie.GetChild("key4","k1");

三、删除
cookie.Expire("key1");
cookie.Expire("key2");
cookie.Expire("key3");
cookie.Expire("key4");