var xmlhttp;

function tarkista_vastaus(kysymys,vastaus)
{
	
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlhttp = new XMLHttpRequest();
	}
	catch (e)
	{
		// Internet Explorer
		try
		{
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}

	xmlhttp.open("GET", "../harjoituksia/tarkista_vastaus.php?kysymys=" + kysymys + "&vastaus=" + vastaus, true);
	
	xmlhttp.onreadystatechange = function()
	{
		if(xmlhttp.readyState == 4)
			if(xmlhttp.status == 200)
			{
				var palaute = document.getElementById("palaute");
				palaute.innerHTML = xmlhttp.responseText;
				palaute.style.display = "block";
			}
	}
	xmlhttp.send(null);
}