function opentree(tree) {
        var cls = '';
        if (document.getElementById) {
                var el = document.getElementById (tree);
				var tmpel;
                if (el && el.className) {
                        el.className = (el.className == 'navOpened') ? 'navClosed' : 'navOpened';
						tmpel = document.getElementById( tree + "_tree" );
						tmpel.className = tmpel.className;
						tmpel = document.getElementById( tree + "_title" );
						tmpel.className = tmpel.className;
                }
        }
        if (navigator.appName == 'Microsoft Internet Explorer' && document.documentElement && navigator.userAgent.indexOf ('Opera') == -1) parent.setScrollInIE();
}