function opentree(tree) {

        var menues = new Array("moeglichkeiten", "produktpalette");

        if (document.getElementById) {

           for (umen=0; umen<menues.length; umen+=1) {
                var el = document.getElementById (menues[umen]);
                if (el && el.className) {
                        el.className = (menues[umen] == tree) ? 'umena' : 'umen';
                        //alert(el.style.display);
//                        el1 = document.getElementById (menues[umen]);
//                        el1.style.display = (menues[umen] == tree) ? 'block': 'none';
                }
           }
        }
//        if (navigator.appName == 'Microsoft Internet Explorer' && document.documentElement && navigator.userAgent.indexOf ('Opera') == -1) parent.setScrollInIE();
//        return false;
}