JS实现多少小时前，多少天前...

最近需要实现题目的功能，因为我的时间戳是PHP生成的，所以转换JS时间戳需要乘1000，废话不多说，看下面的代码把！

大家可以判断一下传进来的值是否为数值型，还有判断是否比当前的时间戳大！可以根据结果提示非法参数等等！

 1 function getDateDiff(dateTimeStamp){
 2         var minute = 1000 * 60;
 3         var hour = minute * 60;
 4         var day = hour * 24;
 5         var halfamonth = day * 15;
 6         var month = day * 30;
 7
 8         var now = new Date().getTime();
 9         var diffValue = now - dateTimeStamp;
10
11         var monthC =diffValue/month;
12         var weekC =diffValue/(7*day);
13         var dayC =diffValue/day;
14         var hourC =diffValue/hour;
15         var minC =diffValue/minute;
16         if(hourC>=12){
17              result = "over";
18          }
19          else if(hourC>=1){
20              result = parseInt(hourC) +"个小时前";
21          }
22          else if(minC>=1){
23             result = parseInt(minC) +"分钟前";
24          }else
25              result = "刚刚发表";
26         return result;
27     }
28
29     var time = getDateDiff(‘1466555123000‘);
30     alert(time);