为什么我添加了开始start 点击了没反应 和上一章语法一样却没有结果 求大神告诉怎么弄
<!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(); console.log(time) document.getElementById("clock").value = time; } // 每隔100毫秒调用clock函数,并将返回值赋值给i var i=setInterval("clock()",100); </script> </head> <body> <form> <input type="text" id="clock" size="50" /> <input type="button" value="Stop" onclick="clearInterval(i)" /> </form> </body> </html>