时间转换

var dateDiff = function( hisTime,nowTime ) {
            hisTime = new Date( hisTime.replace("-","/") ).getTime()
            var now =nowTime?nowTime:new Date().getTime(),
                diffValue = now - hisTime,
                result='',
                minute = 1000 * 60,
                hour = minute * 60,
                day = hour * 24,
                halfamonth = day * 15,
                month = day * 30,
                year = month * 12,
                _year = diffValue/year,
                _month =diffValue/month,
                _week =diffValue/(7*day),
                _day =diffValue/day,
                _hour =diffValue/hour,
                _min =diffValue/minute;
                if(_year>=1) result=parseInt(_year) + "年前";
                else if(_month>=1) result=parseInt(_month) + "个月前";
                else if(_week>=1) result=parseInt(_week) + "周前";
                else if(_day>=1) result=parseInt(_day) +"天前";
                else if(_hour>=1) result=parseInt(_hour) +"个小时前";
                else if(_min>=1) result=parseInt(_min) +"分钟前";
                else result="刚刚";
                return result;
    }