<script> ???///比较函数 ???function compareTime(date1, date2) { ???????var d1_year, d1_month, d1_day, d1, time_span1, ?????????????d2_year, d2_month, d2_day, d2, time_span2; ???????d1_year = date1.getFullYear(); ???????d1_month = date1.getMonth() + 1; ???????d1_day = date1.getDate(); ???????d1 = new Date(d1_year, d1_month - 1, d1_day, 0, 0, 0); ???????time_span1 = date1.getTime() - d1.getTime(); ???????d2_year = date2.getFullYear(); ???????d2_month = date2.getMonth() + 1; ???????d2_day = date2.getDate(); ???????d2 = new Date(d2_year, d2_month - 1, d2_day, 0, 0, 0); ???????time_span2 = date2.getTime() - d2.getTime(); ???????return time_span1 - time_span2; ???} ???//测试 ???var date1 = new Date(2017, 10, 21, 20, 20, 21); ???var date2 = new Date(2016, 5, 2, 20, 20, 30); ???alert(compareTime(date1, date2));</script>
js 只比较时间大小
原文地址：http://www.cnblogs.com/jiangyuwei/p/7730404.html