<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
function calc() {
var x = document.getElementById("x").value;
var y = document.getElementById("y").value;
var sum;
sum = parseInt(x) + parseInt(y);
document.getElementById("sum").value = sum;
}
</script>
</head>
<body>
<h3>덧셈 계산기</h3>
<form name="myform" action=". . ." method="POST">
첫번째 정수 : <input id="x" /><br />
두번째 정수 : <input id="y" /><br />
합계 : <input id="sum" /><br />
<input type="button" value="계산" onclick="calc();" ?>
</form>
</body>
</html>
