Untitled

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>ASDF</title>
</head>
<body>
	<script>
	function eratosthenes(n) {
		var array = [], upperLimit = Math.sqrt(n), output = [];
		for (var i = 0; i < n; i++) {
			array.push(true);
		}
		for (var i = 2; i <= upperLimit; i++) {
			if (array[i]) {
				for (var j = i * i; j < n; j += i) {
					array[j] = false;
				}
			}
		}
		for (var i = 2; i < n; i++) {
			if(array[i]) {
				output.push(i);
			}
		}
		return output;
	}
	function sprawdz() {
		var primes = eratosthenes(parseInt(document.getElementById("a").value));
		document.getElementById("wynik").innerHTML = primes.join(" ");
	}
	</script>
	<div>
		<span>Podaj zakres liczb pierwszych &lt2; n&gt</span>
		<input type="number" id="a">
		<input type="submit" onclick="sprawdz()">
		<div id="wynik">
		</div>
	</div>
</body>
</html>