js日期时间比较

 1 //js日期比较( 要求日期格式：yyyy-mm-dd)
 2 
 3  function DateBiJiao(firstDate, lastDate) {
 4     var arr = firstDate.split("-");
 5     var firsttime = new Date(arr[0], arr[1], arr[2]);
 6     var firsttimes = firsttime.getTime();
 7 
 8     var arrs = lastDate.split("-");
 9     var  lasttime = new Date(arrs[0], arrs[1], arrs[2]);
10     var  lasttimes =  lasttime.getTime();
11 
12     if (firsttimes>= lasttimes) {
13         return false;
14     }
15     else
16         return true;
17 }
18 
19  
20 
21 //js时间比较( 要求日期格式：yyyy-mm-dd hh:mi:ss)
22 
23 function comptime(firstDate,lastDate) {
24     var beginTime = firstDate;
25     var endTime = lastDate;
26     var beginTimes = beginTime.substring(0, 10).split(‘-‘);
27     var endTimes = endTime.substring(0, 10).split(‘-‘);
28 
29     beginTime = beginTimes[1] + ‘-‘ + beginTimes[2] + ‘-‘ + beginTimes[0] + ‘ ‘ + beginTime.substring(10, 19);
30     endTime = endTimes[1] + ‘-‘ + endTimes[2] + ‘-‘ + endTimes[0] + ‘ ‘ + endTime.substring(10, 19);
31 
32     alert(beginTime + "aaa" + endTime);
33     alert(Date.parse(endTime));
34     alert(Date.parse(beginTime));
35     var a = (Date.parse(endTime) - Date.parse(beginTime)) / 3600 / 1000;
36     if (a < 0) {
37         alert("endTime小!");
38     } else if (a > 0) {
39         alert("endTime大!");
40     } else if (a == 0) {
41         alert("时间相等!");
42     } else {
43         return ‘exception‘
44     }
45 }