获取当年年月日
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function date(){
var DA = new Date();
document.write(DA.getFullYear()+"年"+DA.getMonth()+"月"+DA.getDate()+"日");
}
</script>
</head>
<body>
<button onclick="date()">点击</button>
</body>
</html>