Cookie 的操作

 

    setCookie = function (c_name, value, expiredays) {
        var exdate = new Date();
        exdate.setDate(exdate.getDate() + expiredays);
        document.cookie = c_name + "=" + escape(value) + ";path=/" + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString());
    }

   getCookie = function (c_name) {
        if (document.cookie.length > 0) {
            c_start = document.cookie.indexOf(c_name + "=");

            if (c_start != -1) {
                c_start = c_start + c_name.length + 1;
                c_end = document.cookie.indexOf(";", c_start);
                if (c_end == -1) {
                    c_end = document.cookie.length;
                }
                return unescape(document.cookie.substring(c_start, c_end));
            }
        }
        return "";
    }

    this.delCookie = function (name, path, domain) {
        document.cookie = name + "=" + (path ? ";path=" + path : "") + (domain ? ";domain=" + domain : "") + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
    }