Cookie的使用之保存與獲取代碼示例

比較實用的設置Cookie和獲取Cookie方法，下面的示例大家可以參考下，希望對大家有所幫助 代碼爲設置Cookie和獲取Cookie方法的例子

function SetUserCookie() {
//取用戶名
var usr = document.getElementById('user').value;
var expdate = new Date();
//當前時間加上兩週的時間
expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000));
//將最後一個用戶信息寫入到Cookie
SetCookie("49BA-C005-7D-OADOC-5B-USER",usr,expdate);
}
function GetUserCookie() {
var id = "49BA-C005-7D-OADOC-5B-USER";//GUID標識符
var usr = GetCookie(id);
if (usr != null) {
document.getElementById('userid').value = usr;
}
}
//寫入到Cookie

function SetCookie(name, value, expires) {
var argv = SetCookie.arguments;
//本例中length = 3
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape(value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");
}
//取Cookie的值

function GetCookie(name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
//alert(j);
if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break;
}
return null;
}
function getCookieVal(offset) {
var endstr = document.cookie.indexOf(";", offset);
if (endstr == -1) endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}