<html>
<body>
<p>点击下面的按钮，会显示出基于今日日期的消息：</p>
<button onclick="myFunction()">点击这里</button>
<p id="demo"></p>
<script>
function myFunction()
{
var x;
var d=new Date().getDay();
switch (d)
case 6:
x="Today it's Saturday";
break;
case 0:
x="Today it's Sunday";
default:
x="Looking forward to the Weekend";
}
document.getElementById("demo").innerHTML=x;
</script>
</body>
</html>