编辑代码:
查看结果 »
试一试 - ©
w3ii.com
<!DOCTYPE html> <html> <body> <button onClick="setInterval(myCounter, 1000)">Start counter!</button> <p id="demo">Click on the button above and I will count forever.</p> <script> var c = 0; function myCounter() { document.getElementById("demo").innerHTML = ++c; } </script> </body> </html>