//显示发布时间的函数

 function pastTime(_createTime) {

     //var createTime = _createTime.substr(0, _createTime.lastIndexOf(" ")) //不能包含毫秒，如果有毫秒，进行截取

     var nowTime = new Date();

     var cTime = new Date(_createTime);

     var result = parseInt((nowTime - cTime) / 1000 / 60); //分钟数

     if (result < 0) {

         result = Math.abs(720 + result);

     }

     var resultStr = result + "分钟前";

     if (result == 0) {

         resultStr = "刚刚发布"

     }

     //如需显示“月”，“年” 在此处添加if...else

     if (result >= 10080) {

         result = parseInt(result / 60*24*7); //周

         resultStr = result + "周前"

     } else if (result >= 1440) {

         result = parseInt(result / 60*24); //天

         resultStr = result + "天前"

     } else if (result >= 60) {

         result = parseInt(result / 60); //小时

         resultStr = result + "小时前"

     }

     return resultStr;

 }