<script language=vbscript>
function JS_DateAdd(interval, number, date)
JS_DateAdd = DateAdd(interval, number, date)
end function
</script><script language=javascript>
var a ="1989-08-01" ;
alert( JS_DateAdd( "d" , 10 , a ) )
</script>
function JS_DateAdd(interval, number, date)
JS_DateAdd = DateAdd(interval, number, date)
end function
</script><script language=javascript>
var a ="1989-08-01" ;
alert( JS_DateAdd( "d" , 10 , a ) )
</script>
var d1 = new Date(2006,7,1);
document.writeln (d1.toLocaleString());
var d2 = new Date(d1.getFullYear(),d1.getMonth(),d1.getDay()+10);
document.writeln (d2.toLocaleString());
</script>
http://topic.csdn.net/T/20051030/22/4360247.html
var date1 = new Date("2003/12/23");
alert(new Date(date1.getTime() + 5*24*60*60*1000))
</script>
//计算日期的前N天或后N天,
//echo post_date('2006-7-22',10);
//echo post_date('2006-7-22',-10);
function post_date($date, $days) {
$t1 = strtotime($date);
$t2 = $t1 - $days*3600*24;
return date("Y-m-d", $t2);
}