function js_addsidebar(el){
    var tytul = document.title;
    var url = window.location;
    if(window.sidebar){
        window.sidebar.addPanel(tytul, url, "");
    }
    else if(window.external){
        window.external.AddFavorite(url, tytul);
    }
    else if(window.opera && window.print){
        if((typeof el)=='object'){
            var tag = el.tagName ? el.tagName.toLowerCase() : '';
            if(tag=='a'){
                el.rel = 'sidebar';
                el.title = document.title;
                el.href = window.location;
                el.onclick = '';
            }else{
                var appVersion = parseFloat(navigator.appVersion,10);
                if(appVersion<=9.01){
                    var a = document.createElement("a");
                    a.setAttribute("rel","sidebar");
                    a.setAttribute("href", url);
                    a.setAttribute("title", tytul);
                    a.click();
                }else{
                    if(document.getElementById('eldivaddfav')){
                        document.getElementById('eldivaddfav').style.display='';
                    }else{
                        var top=10, left=0, width=300, height=10;
                        if(screen){
                            //top = (screen.height-height)/2;
                            width = screen.width-50;
                        //left = (screen.width-width)/2;
                        }
                        var div = document.createElement("div");
                        div.id = 'eldivaddfav';
                        div.style.cssText = 'padding:20px; text-align:center; background-color:white; border:1px solid #696969; width:'+width+'px; height:'+height+'px; position:fixed; top:'+top+'px; left:'+left+'px; z-index:10000;';
                        div.innerHTML = '<a id="addfav" rel="sidebar" href="'+url+'" title="'+tytul+'" onclick="document.getElementById(\'eldivaddfav\').style.display=\'none\';this.blur();" style="display:block; color:black; font-weight:bold; font-size:12px; font-family:tahoma; text-decoration:none;">dodaj do ulubionych</a>';
                        document.body.appendChild(div);
                    }
                }
            }
        }
    }
}