function makeRequest(url)
{
	var xmlhttp;
	if (window.XMLHttpRequest)
	  xmlhttp = new XMLHttpRequest();
	else if (window.ActiveXObject)
	  xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	else
	  alert("Your browser does not support XMLHTTP!");
      
      xmlhttp.onreadystatechange = function()
      	{
    	  if(xmlhttp.readyState==4)
    		  document.getElementById('wynik').innerHTML = xmlhttp.responseText;
    	  
      	}
      xmlhttp.open('GET', url, true);
      xmlhttp.send(null);
}

function oblicz()
{
	var len = document.getElementById("c_length").value;
	var date = document.getElementById("data").value;
	if (len != "" && date != "")
	{
		document.getElementById('wynik').innerHTML = "Obliczam....";
		document.getElementById('div_wynik').style.display = "block";
		makeRequest("/modules/mod_porod/counting.php?len=" + len + "&date=" + date);
	}
}