几分钟前 几小时前 几天前... 7个阶段

function getDateDiff(dateTimeStamp){
                var minute = 1000*60;
                var hour = minute*60;
                var day = hour*24;
                var halfmonth = day*15;
                var month = day*30;
                var now = new Date().getTime();
                var diffValue = now - dateTimeStamp;
                if(diffValue < 0 ){
                    alert('结束日期不能小于开始日期');
                }
                var monthC = diffValue/month;
                var weekC = diffValue/(7*day);
                var dayC= diffValue/day;
                var hourC = diffValue/hour;
                var minC = diffValue/minute;
                // 7个显示阶段
                if(monthC > 12){// 大于12个月显示年-月-日 时：分
                    console.log(getLocalTime(dateTimeStamp));
                    console.log(dateTimeStamp);
                    return getLocalTime(dateTimeStamp);
                }else if(monthC >= 1){// 一年以内显示 几个月前
                    console.log(parseInt(monthC) + '个月前');
                    return parseInt(monthC) + '个月前';
                }else if(weekC >= 1){// 几周前
                    console.log(parseInt(weekC) + '周前');
                    return parseInt(weekC) + '周前';
                }else if(dayC >= 1){// 几天前
                    console.log(parseInt(dayC) + '天前');
                    return parseInt(dayC) + '天前';
                }else if(hourC >= 1){// 几小时前
                    console.log(parseInt(hourC) + '个小时前');
                    return parseInt(hourC) + '个小时前';
                }else if(minC >= 1){// 几分钟前
                    console.log(parseInt(minC) + '分钟前');
                    return parseInt(minC) + '分钟前';
                }else{// 刚刚
                    console.log('刚刚');
                    return '刚刚';
                }
                // 时间戳转化为日期格式
                function getLocalTime(time) { 
                      var   gnow =     new Date(time);
                         var   gyear = gnow.getFullYear();     
                      var   gmonth = gnow.getMonth()+1;     
                      var   gday = gnow.getDate();     
                      var   ghour = gnow.getHours();     
                      var   gminute = gnow.getMinutes();     
                      var   gsecond = gnow.getSeconds();   
                      function addZera(i){// 格式改为00
                        if(i<10 && i>=0){
                            i='0'+i;
                        }else if(i<0){
                            i='00'
                        }
                        return i;
                      }
                      return   gyear + "-" + addZera(gmonth) + "-" + addZera(gday) + " " + addZera(ghour) + ":" + addZera(gminute) + ":" + addZera(gsecond);     
                }  
            }

原文链接：http://www.qdfuns.com/notes/19055/431cb89442a5350fd82d6c0b05818078.html