Get minutes, seconds, days ago

function timeAgo(atime){
          atime= new Date(atime)
          var byTime = [365*24*60*60*1000,24*60*60*1000,60*60*1000,60*1000,1000];
          var unit = ["年","天","小时","分钟","秒钟"];

   var ct = new Date().getTime()-atime.getTime();
   if(ct<0){
      return "瞎糊闹！"
   }

   var sb = [];
   for(var i=0;i<byTime.length;i++){
      if(ct<byTime[i]){
         continue;
      }
      var temp = Math.floor(ct/byTime[i]);
      ct = ct%byTime[i];
      if(temp>0){
         sb.push(temp+unit[i]);       three time units such as: M years, N minutes and X seconds ago       two time units such as: M minutes and N seconds before       one time unit such as: N minutes before      /* The control outputs at most several time units:
      }






       以此类推
       */
      if(sb.length>=1){
         break;
      }
   }
   //document.write(sb.join("")+"前");
   console.log(sb.join("")+"前")

   return sb.join("")+"前";
}