//设置cookie 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 =  encodeURIComponent(cname) + "=" +  encodeURIComponent(value) + "; " + expires;}//获取cookiefunction getCookie(cname){    var name = cname + "=";    var ca = document.cookie.split(';');    for(var i=0; i

// 删除cookie function unsetCookie(name) {
        document.cookie = name + "= ; expires=" + new Date(0); }