<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script>
count=0;
window.onload=function(){
button1=document.getElementById("button1");
button2=document.getElementById("button2");
div1=document.getElementById("div1");
write = function write(){
count++;
div1.innerHTML = div1.innerHTML + count;
}
start = function start(){
//화면에 1,2,3,4 찍기
auto=setInterval(write,500)//write를 0.5초마다 실행해라.
}
stop=function stop(){
clearInterval(auto);
}
button1.onclick=start;
button2.onclick=stop;
}
</script>
</head>
<body>
<button id="button1"> start </button>
<button id="button2"> stop </button>
<div id="div1" > </div>
</body>
</html>