js 日期时间比较

js时间日期比较
 1 <script type="text/javascript">
 2         //begin > end  返回True
 3         function comptime(beginTime, endTime) {
 4             var begin = beginTime.replace(new RegExp("/", "g"), '-');
 5             var end = endTime.replace(new RegExp("/", "g"), '-');
 6             var beginDate = begin.split(" ")[0];
 7             var endDate = end.split(" ")[0];
 8 
 9             var beginTime = begin.split(" ").length == 1 ? new Array() : begin.split(" ")[1].split(":");
10             var endTime = end.split(" ").length == 1 ? new Array() : end.split(" ")[1].split(":");
11 
12             if (new Date(beginDate) > new Date(endDate)) {
13                 return true;
14             }
15             if (new Date(beginDate) < new Date(endDate)) {
16                 return false;
17             }else {
18                 var length = beginTime.length > endTime.length ? beginTime.length : endTime.length;
19                 beginTime = beginTime.padding(0,length);
20                 endTime = endTime.padding(0, length);
21                 for (var i = 0; i < length; i++) {
22                     if (parseInt(beginTime[i], 10) > parseInt(endTime[i], 10)) {
23                         return true;
24                     }
25                 }
26                 return false;
27             }
28         }
29 
30         Array.prototype.padding = function (numchar, length) {
31             if (this.length < length) {
32                 for (var i = 0; i < length - this.length; i++) {
33                     this.push(numchar);
34                 }
35             }
36 
37             return this;
38         }
39     </script>