function SetCookie(name, value) {
var exp = new Date();
exp.setTime(exp.getTime() + 3 * 24 * 60 * 60 * 1000); //3天过期
document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
return true;
};
function getCookie(name) {
var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
if (arr != null) return arr[2]; return null;
};