<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="js/jquery-3.4.1.min.js"></script>
<title></title>
</head>
<body>
<p></p>
</body>
<script>
var d=new Date(new Date().getFullYear(),0,1)
var year=d.getFullYear()
var month=d.getMonth()+1
var day=d.getDate()
getNatureWeek(d)
function getNatureWeek(d){
var week=new Date(new Date().getFullYear(),0,1).getDay() /* 今年第一天是周几 */
var fina_week=((d-new Date(new Date().getFullYear(),0,1))+86400000*(week-1))/1000/60/60/24/7
$("p").append(year+"年"+month+"月"+day+"日是第"+(parseInt(fina_week)+1)+"周<br/>")
}
</script>
</html>
