var expanded;
function set_expanded() {
    expanded = '';
    var ar = document.getElementById('masterdiv').getElementsByTagName('ul');
    for (var i=0; i<ar.length; i++) {
        id = ar[i].id;
        if (ar[i].style.display == 'block') {
            if (expanded != '') expanded += ':';
            expanded += id;
        }
    }
}
function goto1(where) {
    document.location.href=where+'?expanded='+expanded;
}
function goto(where) {
    document.location.href=where+'&expanded='+expanded;
}
function on(obj) {
    //obj.style.color='#999999';
    obj.style.cursor='pointer';
//    obj.style.textDecoration='underline';
}
function off(obj) {
    obj.style.color='#ffffff';
//    obj.style.textDecoration='none';
}
function skupi_sve(id) {
    var ar = document.getElementById('masterdiv').getElementsByTagName('ul');
    for (var i=0; i<ar.length; i++) {
        ID = ar[i].id;
        if (ID != id) ar[i].style.display = 'none';
    }
    set_expanded();
}
function expand(id) {
    //skupi_sve(id); // ako neces da najpre skupi sve, iskomentarisi ovu liniju 
    var el = document.getElementById(id);
    if (el.style.display != 'block') {
        el.style.display = 'block';
    } else {
        el.style.display = 'none';
    }
    set_expanded();
}