<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JavaScript</title>
<script src="jsLessons.js"></script>
</head>
<body>
<input type="text" id="text" onchange="calcFunc(this.value)">
<input type="button" value="Кнопка" id="button">
</body>
</html>function calcFunc(newS){
alert(parseInt(newS));
}