function CreateBookmarkLink() {
    title = "Travian - Online Gamesite!"; 
    url = "http://travian.bravenet.hu/";
    
    isIE = navigator.userAgent.toUpperCase().indexOf('MSIE') >= 0;
    isFF = navigator.userAgent.toUpperCase().indexOf('FIREFOX') >= 0;
    
    if (isFF) {
        window.sidebar.addPanel(title, url,"");
    } else if (isIE) {
        window.external.AddFavorite( url, title); 
    } else {
        return true;
    }
 }
 
document.write('<a href = "javascript:CreateBookmarkLink()">Bookmark add!</a>');