JavaScript操作cookie

			//写cookies函数
			function SetCookie(name, value) //两个参数，一个是cookie的名子，一个是值
			{
				var Days = 30; //此 cookie 将被保存 30 天
				var exp = new Date(); //new Date("December 31, 9998");
				exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
				document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
			}

			function getCookie(name) //取cookies函数       
			{
				var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
				if (arr != null) return unescape(arr[2]);
				return null;
			}

			function delCookie(name) //删除cookie
			{
				var exp = new Date();
				exp.setTime(exp.getTime() - 1);
				var cval = getCookie(name);
				if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
			}