function q_thumbs(defid, is_up) {
    var url = 'http://abi2009.org/zitate/vote/' + escape(defid) + '/' + escape(is_up) + '/ajax/';
    var req;
    
    var stateChanged = function() {
        if (req.readyState == 4) {
            document.getElementById('quote' + defid).innerHTML = req.responseText;
        }
    }
    
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = stateChanged;
        req.open("GET", url, true);
        req.send(null);
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        
        if (req) {
         req.onreadystatechange = stateChanged;
         req.open("GET", url, true);
         req.send();
        }
    }
}