<script>
	var x = 3, y = 5, d = 'p';

	switch (d) {
		case '+':
			document.write(x+y);
			break;
		case '-':
			document.write(x-y);
			break;
		case '*':
			document.write(x*y);
			break;
		case '/':
			document.write(x/y);
			break;
		case 'p':
			document.write(Math.sqrt(x, y));
			break;
		case 'q':
			document.write(Math.pow(x, y));
			break;
		default:
			document.write('Blad');
			break;
	}
</script>