js判断一个时间是否在一个时间段内

var time_range = function (beginTime, endTime, nowTime) {
2     var strb = beginTime.split (":");
3     if (strb.length != 2) {
4         return false;
5     }
6
7     var stre = endTime.split (":");
8     if (stre.length != 2) {
9         return false;
10     }
11
12     var strn = nowTime.split (":");
13     if (stre.length != 2) {
14         return false;
15     }
16     var b = new Date ();
17     var e = new Date ();
18     var n = new Date ();
19
20     b.setHours (strb[0]);
21     b.setMinutes (strb[1]);
22     e.setHours (stre[0]);
23     e.setMinutes (stre[1]);
24     n.setHours (strn[0]);
25     n.setMinutes (strn[1]);
26
27     if (n.getTime () - b.getTime () > 0 && n.getTime () - e.getTime () < 0) {
28         return true;
29     } else {
30         alert ("当前时间是：" + n.getHours () + ":" + n.getMinutes () + "，不在该时间范围内！");
31         return false;
32     }
33 }
34 time_range ("21:30", "23:30", "3:22");

1 var time_range = function (beginTime, endTime) {
2     var strb = beginTime.split (":");
3     if (strb.length != 2) {
4         return false;
5     }
6
7     var stre = endTime.split (":");
8     if (stre.length != 2) {
9         return false;
10     }
11
12     var b = new Date ();
13     var e = new Date ();
14     var n = new Date ();
15
16     b.setHours (strb[0]);
17     b.setMinutes (strb[1]);
18     e.setHours (stre[0]);
19     e.setMinutes (stre[1]);
20
21     if (n.getTime () - b.getTime () > 0 && n.getTime () - e.getTime () < 0) {
22         return true;
23     } else {
24         alert ("当前时间是：" + n.getHours () + ":" + n.getMinutes () + "，不在该时间范围内！");
25         return false;
26     }
27 }
28 time_range ("21:30", "23:30");