console 命令行工具 X clear
console
<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
<script>
var td=new Date();
var myYear= td.getFullYear();
var myMonth = td.getMonth()+1;
var myDay = td.getDate();

var weekday =["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var weekd = new Date();
var myweekday=weekday[weekd.getDay()];
document.write("今天是"+myYear+"年"+myMonth+"月"+myDay+"日"+" "+myweekday);


</script>


</head>
<body>
</body>
</html>