function newsletter_change(art){ // by Calvin Internet
on='images/radio_on.gif';
off='images/radio_off.gif';	
	if(art=='1'){
	document.images['sechs'].src = on;
	document.images['sieben'].src = off;
	}
	if(art=='2'){
	document.images['sechs'].src = off;
	document.images['sieben'].src = on;
	}
document.forms[0].action.value = art;
}