Untitled

<!DOCTYPE html>
<html lang="pl">
	<head>
		<meta charset="UTF-8">
		<title>strona</title>
		<style>
		body
		{
		background-color:gray;
		}
		</style>
	</head>

	<body>
		<input type="text" id="p1">
		<input type="text" id="p2">
		<input type="button" value="wyslij" onclick="licz()">
		<div id="wynik"></div>
		<script>
			function licz()
			{
				var x = document.getElementById("p1").value;
				var y = document.getElementById("p2").value;

				x = parseInt(x);
				y = parseInt(y);

				var str="";

				if(x>y)
				{
					for(var i=x; i>=y; i--)
					{
						str = str+" "+i;
						//str+=","+i; to samo
					}

				}
				else if(x<y)
				{
					for(var i=x; i<=y; i++)
					{
						str = str+" "+i;
					}

				}
				else if(x==y)
				{

						str = str+" "+x;
				}
				else if(isNaN(x)||isNaN(y))
				{
					str = "Podaj liczbe";
				}
				document.getElementById("wynik").innerHTML = str;


			}
		</script>
	</body>
</html>