Untitled

<html>
    <head><title>Simple Ajax</title>
        <script type="text/javascript">
            function ajaxFunction() {
                var xmlHttp;
                var p = document.getElementById("id1");
                try { // Firefox, Opera 8.0+, Safari
                    xmlHttp = new XMLHttpRequest();
                } catch (e) { // Internet Explorer
                    try {
                        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
                    } catch (e) {
                        try {
                            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
                        } catch (e) {
                            alert("Your browser does not support AJAX!");
                            return false;
                        }
                    }
                }
                xmlHttp.onreadystatechange = function () {
                    if (xmlHttp.readyState == 4) {
                        p.innerHTML = xmlHttp.responseText;
                    }
                }
                xmlHttp.open("GET", "txt.txt", true);
                xmlHttp.send(null);
            }
        </script>
    </head>
    <body>
        <div><input type="button" value="Zmień tekst" onclick="ajaxFunction()";" /></div>
        <p id = "id1">Ten tekst zostanie zmieniony przez AJAX !</p>
    </body>
</html>