JavaScript中Cookie使用

直接上代码：

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