js 获取读取cookie

// --- 设置cookie

function setCookie(sName, sValue, expireHours) {

    var cookieString = sName + "=" + escape(sValue);

    //;推断是否设置过期时间

    if (expireHours > 0) {

        var date = new Date();

        date.setTime(date.getTime + expireHours * 3600 * 1000);

        cookieString = cookieString + "; expire=" + date.toGMTString();

    }

    document.cookie = cookieString;

}

//--- 获取cookie

function getCookie(sName) {

    var aCookie = document.cookie.split("; ");

    for (var j = 0; j < aCookie.length; j++) {

        var aCrumb = aCookie[j].split("=");

        if (escape(sName) == aCrumb[0])

            return unescape(aCrumb[1]);

    }

    return null;

}