1.js存入cookie

function setCookie (name, value){ 
    //name相當於key,value為轉入的值
    var expdate = new Date();   //初始化時間
    expdate.setTime(expdate.getTime() + 30 * 60 * 1000);   //時間單位毫秒
    document.cookie = name+"="+value+";expires="+expdate.toGMTString()+";path=/";
}

2.讀取cookie　　

function getCookie(c_name) {
    //這裡的c_name為setCookie()中name的key值
    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 ""
}

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