JS的Cookie操作方法

/**
 * COOKIE赋值
 * @param {string} cName cookie名
 * @param {int} value    cookie值
 * @param {int} exdays   cookie有效期
 * @returns
 */
function setCookie(cName, value, exdays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + exdays);
    var cValue = encodeURIComponent(value) + ((exdays == null) ? '' :
            '; expires=' + exdate.toUTCString());
    document.cookie = [cName, '=', cValue].join('');
}

/**
 * COOKIE取值
 * @param {string} cName cookie名
 */
function getCookie(cName) {
    var i, x, y, ARRcookies = document.cookie.split(';');
    for (i = 0; i < ARRcookies.length; i++) {
        x = ARRcookies[i].substr(0, ARRcookies[i].indexOf('='));
        y = ARRcookies[i].substr(ARRcookies[i].indexOf('=') + 1);
        x = x.replace(/^\s+|\s+$/g, '');
        if (x === cName) {
            return decodeURIComponent(y);
        }
    }
}