if (window.XMLHttpRequest)     // Object of the current windows
{ 
    xhr = new XMLHttpRequest();     // Firefox, Safari, ...
} 
else 
 if (window.ActiveXObject)   // ActiveX version
 {
    xhr = new ActiveXObject("Microsoft.XMLHTTP");  // Internet Explorer 
 } 
 

function wyslij_feedback()
{
var e = document.getElementById('feedtext');
var tresc = encodeURI(e.value);
var www_text = encodeURI(document.location.href);

document.getElementById('formularz_1').innerHTML = '<span style="color:white">&nbsp;&nbsp;&nbsp;Dziękujemy za Państwa uwagi.</span>';
	xhr.onreadystatechange = function() 
	{
		if (xhr.readyState == 4)
		{
		 document.getElementById('wynik').innerHTML = xhr.responseText;
		}
	}
xhr.open("GET", "include/zapisz_feedback.php?komentarz="+tresc+"&www="+www_text,  true); 
xhr.send(null); 
}