为什么运行不了?
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>计时器</title> <script type="text/javascript"> var num=0; function startCount() { document.getElementById('count').value=num; num=num+1; var i=setTimeout("startCount()",1000); }a </script> </head> <body> <form> <input type="text" id="count" /> <input type="button" value="stop" onclick="clearTimeout(i)"/> </form> </body> </html>
没反应。。。。