Numeric validation with onkeypress in js.html

<html>

<head>
	<script type="text/javascript">
		function numeric(e) {
			var keyCode = (e.which) ? e.which : e.keyCode;
			if (keyCode != 46 && keyCode > 31 && (keyCode < 48 || keyCode > 57)) {
				alert("only Numbers");
				return false;
			}
			return true;
		}
	</script>
</head>

<body>
	<input type="text" placeholder="Numbers" id="numb" required onKeyPress="return numeric(event)"
		onKeyUp="validate(this)">
</body>

</html>