function showThis(what) {
		document.getElementById(what).style.visibility='visible';
		document.getElementById(what).style.position='relative';
}
function hideThis(what) {
		document.getElementById(what).style.visibility='hidden';
		document.getElementById(what).style.position='absolute';
}

function showhideThis(what,which) {
if(document.getElementById(which).checked){ showThis(what); 
	} else { 
	hideThis(what); 
	if(what == 'addressinvoice' && document.getElementById('nowformshipment').checked){ 
		hideThis('addressshipment');
		}
	}
}