返回微信的多少分钟前，多少小时前，多少天前小方法

function js_strto_times(str_time){
var new_str = str_time.replace(/:/g,"-");
new_str = new_str.replace(/ /g,"-");
var arr = new_str.split("-");
var datum = new Date(Date.UTC(arr[0],arr[1]-1,arr[2],arr[3]-8,arr[4]));
return strtotime = datum.getTime();
}
function  formatDate(dateTimeStamp){
var date = js_strto_times(dateTimeStamp);
var commondate = dateTimeStamp;
var now = new Date().getTime();
//console.log(now);
var diffValue = now - date;
var monthC =diffValue/month;
var weekC =diffValue/(7*day);
var dayC =diffValue/day;
var hourC =diffValue/hour;
var minC =diffValue/minute;
if(dayC>=1){
result=commondate;
}
else if(hourC>=1){
if(hourC >=10){
result = commondate;
}else{
result=parseInt(hourC) +"个小时前";
}
}
else if(minC>=1){
result=parseInt(minC) +"分钟前";
}else
result="刚刚";
return result;
}