<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>计时器</title> <script type="text/javascript"> function clock(){ var time=new Date(); document.getElementById("clock").value = time; } var i=setInterval(clock,100) </script> </head> <body> <form> <input type="text" id="clock" size="50" /> <input type="button" value="Stop" onclick="clearInterval(i)" /> <input type ="button" value="Start" onclick="seInterval(i)"/> </form> </body> </html>
在clock函数里面加上clearInterval(i);
在clock函数里面加上clearInterval(i);