JavaScript~設(shè)置/獲取/刪除cookie

設(shè)置cookie

function?setCookie(name,value,expires)
????{
???????
????????var?exp?=?new?Date();
????????exp.setTime(exp.getTime()?+?expires*1000);
????????document.cookie?=?name?+?"="+?escape?(value)?+?";expires="?+?exp.toGMTString();
????}

function?setCookie(cname,cvalue,exdays){
??var?d?=?new?Date();??
????d.setTime(d.getTime()+(exdays*24*60*60*1000));??
????var?expires?=?"expires="+d.toGMTString();??
????document.cookie?=?cname?+?"="?+?escape(cvalue)?+?";?"?+?expires;
}

獲取cookie

function?getCookie(name)
????{
????????var?arr?=?document.cookie.match(new?RegExp("(^|?)"+name+"=([^;]*)(;|$)"));
????????if(arr?!=?null)?return?unescape(arr[2]);?
????????return?false;
????}
????
function?getCookie(cname){
????var?name?=?cname?+?"=";??
????var?ca?=?document.cookie.split(';');??
????for(var?i=0;?i<ca.length;?i++)?
????{
????????var?c?=?ca[i].trim();????
????????if?(c.indexOf(name)==0){
????????????return?c.substring(name.length,c.length);?
????????}?
?????}
?????return?"";
}

刪除cookie

刪除 cookie 非常簡(jiǎn)單。您只需要設(shè)置 expires 參數(shù)為以前的時(shí)間即可

document.cookie='firstname=John;expires=Thu,?01?Jan?1970?00:00:00?GMT'