window.onload = function() {
            
}

function toggle(element, id) {
    //navigation = document.getElementById('main_menu');
    //submenu_list = navigation.getElementsByTagName('UL');
    //IE6 submenu_list = document.getElementsByName('sub_navi');
    
    link_list = document.getElementsByName('expander');
    li_list = document.getElementsByName('expander_li');
    //document.getElementById('aktuelles_expander').className = '';
   
    // IE6 ...
    document.getElementById('galerie').style.display  = 'none';
    document.getElementById('ausstellungen').style.display  = 'none';
    document.getElementById('kuenstler').style.display  = 'none';
    
    document.getElementById('galerie_expander').className = '';
    document.getElementById('ausstellungen_expander').className = '';
    document.getElementById('kuenstler_expander').className = '';
    document.getElementById('aktuelles_expander').className = '';
    
    document.getElementById('galerie_link').className = '';
    document.getElementById('ausstellungen_link').className = '';
    document.getElementById('kuenstler_link').className = '';
    document.getElementById('aktuelles_link').className = '';
    
    //alert(document.getElementById('galerie_expander').className);
    
    /*for (var i = 0; i < submenu_list.length; i++) {
        
        submenu_list[i].style.display = 'none';
        link_list[i].className = '';
        li_list[i].className = '';
    }*/
    
    element.className = 'active';
    document.getElementById(id).style.display = 'block';
}

function collapseAll() {
    navigation = document.getElementById('main_menu');
    submenu_list = navigation.getElementsByTagName('UL');
    link_list = document.getElementsByName('expander');
    
    for (var i = 0; i < submenu_list.length; i++) {
        submenu_list[i].style.display = 'none';
        link_list[i].className = '';
    }
}