简单教程
提交运行
代码编辑器：
<p id="demo">单击按钮显示今天周几</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var d = new Date(); var weekday=new Array(7); weekday[0]="周日"; weekday[1]="周一"; weekday[2]="周二"; weekday[3]="周三"; weekday[4]="周四"; weekday[5]="周五"; weekday[6]="周六"; var x = document.getElementById("demo"); x.innerHTML=weekday[d.getDay()]; } </script>
运行结果：