JS时间处理，获取天时分秒。以及浏览器出现的不兼容问题

function ToTime(second) {
    second = second / 1000;
    var result
    var s = second % 60;
    var m = parseInt(second / 60) % 60;
    var h = parseInt(second / 3600) % 24;
    var d = parseInt(second / (3600 * 24));
    if (d != 0) {
        result = d + "天" + h + "小时" + m + "分钟" + s + "秒";
    }
    else if (h != 0) {
        result = h + "小时" + m + "分钟" + s + "秒";
    }
    else if (m != 0) {
        result = m + "分钟" + s + "秒";
    }
    else {
        result = s + "秒";
    }
    return result;
}

 1 function GetTime(a, b, type) {
 2     type = type.toUpperCase();  //将参数变成大写字母
 3     var date1 = new Date(a);    //开始时间
 4     var date2 = new Date(b);     //结束时间
 5     var date3 = date2.getTime() - date1.getTime(); //时间差的毫秒数
 6     var result = "-1";
 7     //计算出相差天数
 8     if (type == "D") result = Math.floor(date3 / (24 * 3600 * 1000));
 9     //计算出小时数 
10     //if (type == "H") result = Math.floor(date3 % (24 * 3600 * 1000) / (3600 * 1000));
11     if (type == "H") result = Math.floor(date3 / (3600 * 1000));
12     //计算相差分钟数
13     //if (type == "M") result = Math.floor(date3 % (24 * 3600 * 1000) % (3600 * 1000) / (60 * 1000));
14     if (type == "M") result = Math.floor(date3 / (60 * 1000));
15     //计算相差秒数
16     //if (type == "S") result = Math.floor(date3 % (24 * 3600 * 1000) % (3600 * 1000) % (60 * 1000) / 1000);
17     if (type == "S") result = Math.floor(date3 / 1000);
18     return result;
19 };