图片标记处有什么问题吗?直接执行函数不可以这么写吗
没问题呀,可以运行
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>计时器</title> </head> <script type="text/javascript"> var num=0; window.onload=function startCount() { document.getElementById("count").value=num; num=num+1; setTimeout(startCount,1000) } startCount() </script> </head> <body> <form> <input type="text" id="count"> </form> </body> </html>