var request = false;
        function setRequest(value) {
                if (window.XMLHttpRequest) {
                        request = new XMLHttpRequest();
                } else if (window.ActiveXObject) {
                        try {
                                request = new ActiveXObject('Msxml2.XMLHTTP');
                        } catch (e) {
                                try {
                                        request = new ActiveXObject('Microsoft.XMLHTTP');
                                } catch (e) {}
                        }
                }

                if (!request) {
                        alert("Kann keine XMLHTTP-Instanz erzeugen.");
                        return false;
                } else {
                        var url = "content.php";
                        request.open('post', url, true);
                        request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                        request.send('name='+value);
                        request.onreadystatechange = interpretRequest;
                }
        }

        function interpretRequest() {
                switch (request.readyState) {
                        case 4:
                                if (request.status != 200) {
                                        alert("Ups... da ist etwas schief gelaufen!");
                                } else {
                                        var content = request.responseText;
                                        document.getElementById('content').innerHTML = content;
                                }
                                break;
                        default:
                                break;
                }
        }