JAVASCRIPT 实现普通日期转换多少小时前、多少分钟前、多少秒

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<HTML> 
<HEAD> 
<TITLE> New Document </TITLE> 
<META NAME="Generator" CONTENT="EditPlus"> 
<META NAME="Author" CONTENT=""> 
<META NAME="Keywords" CONTENT=""> 
<META NAME="Description" CONTENT=""> 
<script language="javascript"> 
function stringToDateTime(postdate) 
{ 
var second = 1000; 
var minutes = second*60; 
var hours = minutes*60; 
var days = hours*24; 
var months = days*30; 
var twomonths = days*365; 
var myDate = new Date(Date.parse(postdate)); 
if (isNaN(myDate)) 
{ 
myDate =new Date(postdate.replace(/-/g, "/")); 
} 
var nowtime = new Date(); 
var longtime =nowtime.getTime()- myDate.getTime(); 
var showtime = 0; 
if( longtime > months*2 ) 
{ 
return postdate; 
} 
else if (longtime > months) 
{ 
return "1个月前"; 
} 
else if (longtime > days*7) 
{ 
return ("1周前"); 
} 
else if (longtime > days) 
{ 
return(Math.floor(longtime/days)+"天前"); 
} 
else if ( longtime > hours) 
{ 
return(Math.floor(longtime/hours)+"小时前"); 
} 
else if (longtime > minutes) 
{ 
return(Math.floor(longtime/minutes)+"分钟前"); 
} 
else if (longtime > second) 
{ 
return(Math.floor(longtime/second)+"秒前"); 
}else 
{ 
return(longtime+" error "); 
} 
} 
document.write(stringToDateTime("2009-05-24 15:05:00")); 
</script> 
</HEAD> 
<BODY > 
</BODY> 
</HTML>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

网上有用C#后台实现的方法，为方便查看就转贴到下面吧：）

复制代码代码如下:

public string DateStringFromNow(DateTime dt) 
{ 
TimeSpan span = DateTime.Now - dt; 
if (span.TotalDays >60) 
{ 
return dt.ToShortDateString(); 
} 
else 
if ( span.TotalDays >30 ) 
{ 
return 
"1个月前"; 
} 
else 
if (span.TotalDays >14) 
{ 
return 
"2周前"; 
} 
else 
if (span.TotalDays >7) 
{ 
return 
"1周前"; 
} 
else 
if (span.TotalDays >1) 
{ 
return 
string.Format("{0}天前", (int)Math.Floor(span.TotalDays)); 
} 
else 
if (span.TotalHours >1) 
{ 
return 
string.Format("{0}小时前", (int)Math.Floor(span.TotalHours)); 
} 
else 
if (span.TotalMinutes >1) 
{ 
return 
string.Format("{0}分钟前", (int)Math.Floor(span.TotalMinutes)); 
} 
else 
if (span.TotalSeconds >=1) 
{ 
return 
string.Format("{0}秒前", (int)Math.Floor(span.TotalSeconds)); 
} 
else 
{ 
return 
"1秒前"; 
} 
}

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