<!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; } setInterval(clock,50); </script> </head> <body> <form> <input type="text" id="clock" size="50" /> <input type="button" value="Stop" onclick="clearInterval(int)" /> </form> </body> </html>
var i=setInterval("clock()",100);
<input type="button" value="Stop"
onclick="clearInterval(i)"/>
setInterval和clearInterval只是执行事件,clear清除Interval(i),你的没有参数
vat t = setInterval(clock,50);
clearInterval(t);
var timer = setInterval(clock,50);
条件判断后用clearInterval(timer)吧.