var tmpSource,tmpID;
        function swap(id,source){
         tmpSource = document.images[id].src ; tmpID = id
         document.images[id].src = source;
        }
        function reset(){ document.images[tmpID].src = tmpSource; }

          if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) { 
            var url="http://www.jswis.de/Foehr";
            var title="Insel Föhr - Urlaub auf der Nordseeinsel.";
            document.write('<A HREF="javascript:window.external.AddFavorite(url,title);" ');
            document.write('onMouseOver=" ');
            document.write(" swap('Image1','../bilder/favorit_a.gif');");
            document.write('window.status=');
            document.write("'Zu den Favoriten hinzuf&uuml;gen'; return true ");
            document.write('" onMouseOut=" reset(); window.status=');
            document.write("' '; return true ");
            document.write('">');
            document.write('<img src="../bilder/favorit.gif" width="17" height="14" border="0" name="Image1" alt="Zu den Favoriten hinzuf&uuml;gen">');
            document.write('</a>&nbsp;&nbsp;');
           }