function tuc_search() {
    var f = document.forms.suchen;
    
	if (! f) return true;
    
	if (f.q.length < 0) return false;   // kein Suchwort
    var s_type = 'text';
    var t = document.forms.suchen.t;
    for (var i=0; i < t.length; i++) {
        if (t[i].checked) {
            s_type = t[i].value;
            break;
        }
    }
    var w = f.where.value;
    var loc = '';
    var query = escape(f.q.value);
    switch (s_type) {
    case 'text': loc = 'http://suche.tu-chemnitz.de/search?output=xml_no_dtd&client=tu_frontend&proxystylesheet=tu_frontend&oe=UTF-8&ie=latin1&site=default_collection&sitesearch=' + w+ '&q=' + query;
                break;
    case 'pers': loc = 'http://www.tu-chemnitz.de/www-index/personen.html?query=' + query;
                break;
    case 'uakt': loc = 'http://www.tu-chemnitz.de/tu/presse/aktuell/index.php?search=' + query;
                break;
    case 'goog': loc = 'http://www.google.de/search?q=' + query + '&ie=utf-8&oe=utf-8&aq=t';
                break;
    case 'beol': loc = 'http://dict.tu-chemnitz.de/?query=' + query;
                break;
    }
    if (loc)
        document.location.href = loc;

    return false;
}