<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>РАСЧЕТ ПАРАМЕТРОВ БОЧКИ</title>
</head>
<body>
<form id="form">
<input name = "H" size="20"><br>
<input name = "R" size="20"><br>
<input name = "A" size="20"><br>
<button type="submit">Расчитать</button>
<button type="reset">Очистить</button>
Объем равен = <input name="result" readonly style=" color:#FF0000" size="1" value="_" /> кубических миллиметров.
</form>
<script>
var form = document.forms.form;
form.onsubmit = function() {
var h = this.H.value;
var r = this.R.value;
var a = this.A.value;
this.result.value = h*r*a;
return false;
};
</script>
</body>
</html>