js实现cookie的存取值

1.js存入cookie

function setCookie (name, value){ 
    //name相当于key,value为转入的值
    var expdate = new Date();   //初始化时间
    expdate.setTime(expdate.getTime() + 30 * 60 * 1000);   //时间单位毫秒
    document.cookie = name+"="+value+";expires="+expdate.toGMTString()+";path=/";
}

2.读取cookie　　

function getCookie(c_name) {
    //这里的c_name为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 ""
}