获取星期
语法：new Date().getDay()
功能：获取星期
返回值：number(0-6) //0=周日
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>获取星期</title>
</head>
<body>
<script>
var week=new Date().getDay();
console.log(week);
</script>
</body>
</html>今天是星期几？
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>while循环</title>
</head>
<body>
<script>
var a=new Date().getDay();
var b="";
switch(a){
case 0:
b="日";
break;
case 1:
b="一";
break;
case 2:
b="二";
break;
case 3:
b="三";
break;
case 4:
b="四";
break;
case 5:
b="五";
break;
default:
b="六";
}
document.write("今天是星期"+b);
</script>
</body>
</html>