JavaScript函数时间友好显示

//JavaScript函数：
var minute = 1000 * 60;
var hour = minute * 60;
var day = hour * 24;
var halfamonth = day * 15;
var month = day * 30;
function getDateDiff(dateTimeStamp){
var now = new Date().getTime();
var diffValue = now - dateTimeStamp;
if(diffValue < 0){
 //若日期不符则弹出窗口告之
 //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;
if(monthC>=1){
 result="发表于" + parseInt(monthC) + "个月前";
 }
 else if(weekC>=1){
 result="发表于" + parseInt(weekC) + "周前";
 }
 else if(dayC>=1){
 result="发表于"+ parseInt(dayC) +"天前";
 }
 else if(hourC>=1){
 result="发表于"+ parseInt(hourC) +"个小时前";
 }
 else if(minC>=1){
 result="发表于"+ parseInt(minC) +"分钟前";
 }else
 result="刚刚发表";
return result;
}