document.write('<link rel="stylesheet" href="/fileadmin/template/douzelage/css/');
    var agt=navigator.userAgent.toLowerCase();
    if (agt.indexOf('opera') != -1) document.write('opera.css');
    else if (agt.indexOf('gecko') != -1) document.write('mozilla.css');
    else document.write('ie.css');
   document.write('" type="text/css">');