function bookmark(sitename){
var address=document.URL;
if (window.sidebar){
window.sidebar.addPanel(sitename, address,"");
} else if( document.all ){
window.external.AddFavorite(address, sitename);
} else if( window.opera && window.print ){
return true;
}
}

function chg(e, f) {
e.src = f;
}