function hide_unhide_div(obj) {
    if(obj != null && obj.style != null) {
        if(obj.style.display != 'block') {
            obj.style.display = 'block';
        }
        else {
            obj.style.display = 'none';
        }
    }
}
function hide_unhide_menu() {
    obj = document.getElementById('lista_kategorii');
    obj_oper = frames['oper'];
    //alert(obj_oper.location.href);
    if(obj != null) {
        hide_unhide_div(obj);
        
        if(obj_oper != null) {
            if(obj.style.display == 'block') {
                oper.location.href ='oper.php?oper=menu_rozwiniete';
            }
            else {
                oper.location.href ='oper.php?oper=menu_zwiniete';
            }
        }
    }
}

function printer_version() {
	window.open(location.href + '&druk=1','',"height=600,width=800,location=0,status=1,scrollbars=1,toolbar=0,resizable=1");
}

function show_help_frame(idx) {
	window.open('?module=page&idx=' + idx + '&frame=1','',"height=600,width=800,location=0,status=1,scrollbars=1,toolbar=0,resizable=1");
}