菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<body>

<p>点击按钮显示今天是星期几。</p>

<button onclick="myFunction()">点我</button>

<p id="demo"></p>

<script>
function myFunction() {
    var day;
    switch (new Date().getDay()) {
        case 0:
            day = "Sunday";
            break;
        case 1:
            day = "Monday";
            break;
        case 2:
            day = "Tuesday";
            break;
        case 3:
            day = "Wednesday";
            break;
        case 4:
            day = "Thursday";
            break;
        case 5:
            day = "Friday";
            break;
        case  6:
            day = "Saturday";
            break;
    }
    document.getElementById("demo").innerHTML = "Today is " + day;
}
</script>

</body>
</html>

              