asp如何计算两个时间差多少分钟

datediff函数
比如：

dateDiff("d","2010-5-1",now())与现在相差多少天
dateDiff("y","2010-5-1",now())与现在相差多少年
dateDiff("m","2010-5-1",now())与现在相差多少月
dateDiff("n","2016-5-1 10:00:00",now())与现在相差多少分钟