function getCookie(name){
    var strcookie = document.cookie;//获取cookie字符串
    var arrcookie = strcookie.split("; ");//分割
    //遍历匹配
    for ( var i = 0; i < arrcookie.length; i++) {
        var arr = arrcookie[i].split("=");
        if (arr[0] == name){
            return arr[1];
        }
    }
    return "";
}