GitBucket
<!DOCTYPE html>
<html lang='ja'>
<head>
<meta charset = 'UTF-8'/>
<title>sample</title>
<script>
window.onload = function(){
var timer;
timer = window.setTimeout(
function(){
alert('hello');
},
5000
);
document.getElementById('btn').onclick = function(){
window.clearTimeout(timer);
};
};
</script>
</head>
<body>
<input id = "btn" type = "botton" value="タイマー停止"/>
</body>
</html>