diff --git a/robocze/script.js b/robocze/script.js
index 5aa4aa9..5af104a 100644
--- a/robocze/script.js
+++ b/robocze/script.js
@@ -26,22 +26,35 @@ function init() {
 }
 
 function initAjax() {
-	try {
-		if (window.XMLHttpRequest) {
-			ajax = new XMLHttpRequest();
-			ajax.overrideMimeType('text/xml');
-		}
-		else if (window.ActiveXObject)
-			ajax = new ActiveXObject('Microsoft.XMLHTTP');
-		else throw 'AJAX Error';
-	}
-	catch (e) {
-		return false;
+	try
+	{
+		ajax = new XMLHttpRequest(); // nowoczesne przegladarki
+		ajax.overrideMimeType('text/xml');
 	}
-	if (!ajax) {
-		alert('AJAX Error');
-		return false;
+	catch(e) // IE <= 6
+	{
+		var XmlHttpVersions = [
+		'MSXML2.XMLHTTP.6.0',
+		'MSXML2.XMLHTTP.5.0',
+		'MSXML2.XMLHTTP.4.0',
+		'MSXML2.XMLHTTP.3.0',
+		'MSXML2.XMLHTTP',
+		'Microsoft.XMLHTTP'
+		];
+		for (var i=0; i < XmlHttpVersions.length && null === ajax; i++)
+		{
+			try
+			{
+				ajax = new ActiveXObject(XmlHttpVersions[i]);
+			} catch (e) {}
+		}
+		
+		if (null === ajax)
+		{
+			throw new Error('AJAX Error');
+		}
 	}
+	
 	return true;
 }