菜鸟学堂
在线运行
源代码
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟学堂()</title> </head> <body> <p id="demo">单击按钮显示时间：</p> <button onclick="myFunction()">点我</button> <script> function addZero(x,n){ if (x.toString().length<n) { x="0" + x; } return x; } function myFunction(){ var d=new Date(); var x=document.getElementById("demo"); var h=addZero(d.getHours(),2); var m=addZero(d.getMinutes(),2); var s=addZero(d.getSeconds(),2); var ms=addZero(d.getMilliseconds(),3); x.innerHTML=h + ":" + m + ":" + s + ":" + ms; } </script> </body> </html>
运行结果
在线运行
菜鸟学堂 edu.jb51.net