function sendRequest() {
        var req;
        try {
                req = window.XMLHttpRequest?new XMLHttpRequest():
                new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {
                //Kein AJAX Support
        }

        req.onreadystatechange = function() {
                if ((req.readyState == 4) && (req.status == 200)) {
                        document.getElementById('inhalt').innerHTML = req.responseText;
                }
        };
        var id = document.getElementById('dropdown').value;
        req.open('POST', './fileadmin/php_scripts/frontend/allgemein/func_suchauftrag.php');
        req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        req.send('s='+ id);

}