设置cookie过期时间一年

function newcookie(id, value) {
//webkfa.com
var expires = new Date()
//3600是一小时的秒数
//24是一天的多少个小时
//365是一年多少天
//1000是一秒等于1000毫秒
//所以midtime就是一年的毫秒数
var midtime = 3600*24*365*1000;
expires.setTime(expires.getTime() + midtime); //默认当天内第一次访问弹出窗口，否则不弹出
var expiryDate = expires.toUTCString();
document.cookie = id + "=" + value + ";expires=" + expiryDate;
}

function getCookie(name) {
//webkfa.com
var cookiefound = false
var start = 0
var end = 0
var cookiestring = document.cookie;
var i = 0;
while (i <= cookiestring.length) {
start = i
end = start + name.length
if (cookiestring.substring(start, end) == name) {
cookiefound = true;
break;
}
i++;
}
if (cookiefound == true) {
start = end + 1;
end = cookiestring.indexOf(";", start);
if (end < start) {
end = cookiestring.length;
}
return cookiestring.substring(start, end);
}
return "";
}