/**
     * 求取两个时间的秒数的差值
     * time1 为较小时间 格式： yyyy-MM-dd HH:mm:ss
     * time2 为较大时间 格式： yyyy-MM-dd HH:mm:ss
     */
    function getSec(time1, time2){
        var now = new Date();
        var a = time1.split(" ")[0].split("-");
        now.setFullYear(parseInt(a[0]), parseInt(a[1]) - 1, parseInt(a[2]));
        a = time1.split(" ")[1].split(":");
        now.setHours(parseInt(a[0]), parseInt(a[1]), parseInt(a[2]), 0);
        
        var end = new Date();
        a = time2.split(" ")[0].split("-");
        end.setFullYear(parseInt(a[0]), parseInt(a[1]) - 1, parseInt(a[2]));
        a = time2.split(" ")[1].split(":");
        end.setHours(parseInt(a[0]), parseInt(a[1]), parseInt(a[2]), 0);
        
        var sec = (end.getTime() - now.getTime()) / 1000;
        return sec;
    }