var http_request = false;

function makeRequest(url) 
{
        http_request = false;
        
        if (window.XMLHttpRequest) //Mozilla, ...
        { 
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType)
                {
                http_request.overrideMimeType('text/xml');
        }
    }
        else if (window.ActiveXObject) //IE
        { 
                try 
                {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } 
                catch (e) 
                {
                try 
                        {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } 
                        catch (e) 
                        {}
        }
    }

    if (!http_request)
        {
        alert('Nie mozna stworzyc instancji obiektu XMLHTTP!');
        return false;
    }
    http_request.onreadystatechange = alertContents;
    http_request.open('GET', url, true);
    http_request.send(null);
}

function alertContents() 
{
        if (http_request.readyState == 4) 
        {
                document.getElementById("ramka").innerHTML = http_request.responseText; // gdzie bede wczytywal
    }
}