<script type="text/javascript">
//計(jì)算一個(gè)日期字符串與當(dāng)前日期相差值
//輸入的參數(shù)形式如：2012-12-12 12:12:12
//返回相差值的字符串
function GetDateDiff(datetime)
{
// 可以將2012 - 12 - 12 12 : 12 : 12字符串轉(zhuǎn)為JS中的時(shí)期對象,
// 因?yàn)槟J(rèn)情況下只把持2000 / 05 / 05這樣形式的字符串轉(zhuǎn)為時(shí)間對象
var dateBegin = new Date(datetime.replace(/-/g, "/"));
var dateEnd = new Date();
var dateDiff = dateEnd.getTime() - dateBegin.getTime();
// 計(jì)算相差的天數(shù)
var dayDiff = Math.floor(dateDiff / (24 * 3600 * 1000));
var returnstr = "";
if(dayDiff > 2) //前天以前就直接返回時(shí)間字符串
{
return datetime;
}
else //前天以來的處理
{
var parttime = datetime.substring(11);
switch (dayDiff)
{
case 2 :
returnstr += "前天 " + parttime;
break;
case 1 :
returnstr += "昨天 " + parttime;
break;
default : //對今天的操作
var minuteleft = Math.floor(dateDiff / (60 * 1000)); //計(jì)算相差的分鐘數(shù)
if(minuteleft > 30)
{
returnstr += "今天 " + parttime;
}
else if (minuteleft == 0)
{
returnstr += Math.floor(dateDiff / 1000) + "秒前";
}
else
{
returnstr += minuteleft + "分鐘前";
}
}
alert(returnstr);
return returnstr;
}
}
☆其它備錄：
//
//// 計(jì)算出小時(shí)數(shù)
// var leftSecond1 = dateDiff % (24 * 3600 * 1000) // 計(jì)算天數(shù)后剩余的毫秒數(shù)
// var hourDiff = Math.floor(leftSecond1 / (3600 * 1000))
//// 計(jì)算相差分鐘數(shù)
// var leftSecond2 = leftSecond1 % (3600 * 1000) // 計(jì)算小時(shí)數(shù)后剩余的毫秒數(shù)
// var minuteDiff = Math.floor(leftSecond2 / (60 * 1000))
//// 計(jì)算相差秒數(shù)
// var leftSecond3 = leftSecond2 % (60 * 1000) // 計(jì)算分鐘數(shù)后剩余的毫秒數(shù)
// var secondDiff = Math.round(leftSecond3 / 1000)
// var returnstr = "";
//function ToDate1(datetime)
//{
// // 可以將20080808字符串轉(zhuǎn)為JS中的時(shí)期對象
// return new Date(bd.replace(/^(\d{4})(\d{2})(\d{2})$/, "$1/$2/$3"));
//}
</script>