Ho sostituito il link da aggiungere nelle impostazioni Internet Explorer.
Dovrebbe funzionare

codice:
<script type="text/javascript" language="javascript1.2"><!--
if( window.sidebar && window.sidebar.addPanel ) {
if (navigator.userAgent.lastIndexOf("Netscape") != -1) {
document.write( '<a href="java script:window.sidebar.addPanel( 'NotOnlyWeb', 'http:\/\/www.notonlyweb.com', '' );">[img]img/ns.png[/img]<\/a>' );
}else{
document.write( '<a href="java script:window.sidebar.addPanel( 'NotOnlyWeb', 'http:\/\/www.notonlyweb.com', '' );">[img]img/fir.png[/img]<\/a>' );
}
}if( window.opera && window.print ) {
document.write( '<a title="NotOnlyWeb" rel="sidebar" href="http:\/\/www.notonlyweb.com">[img]img/oper.png[/img]<\/a>' );
} else if( window.external && ( navigator.platform == 'Win32' || ( window.ScriptEngine && ScriptEngine().indexOf('InScript') + 1 ) ) ) {
document.write( '<a href="java script:window.external.AddFavorite('http:\/\/www.notonlyweb.com','NotOnlyWeb');">[img]img/ie.png[/img]' + ( ( navigator.platform == 'Win32' ) ? '' : 'Aggiugi preferiti' ) + '<\/a>' );
}

//-->
</script>