function setField() {

	var obj= document.getElementById('delivery_address').style;

	if ( obj.display!='none' )
		obj.display='none';
	else
		obj.display='block';

	if ( document.encomenda.delivery_name.disabled=false || !document.encomenda.delivery_name.disabled )
	{
		document.encomenda.delivery_name.disabled=true;
		document.encomenda.delivery_address.disabled=true;
		document.encomenda.delivery_zipcode.disabled=true;
		document.encomenda.delivery_city.disabled=true;		
	}
	else {
		document.encomenda.delivery_name.disabled=false;
		document.encomenda.delivery_address.disabled=false;
		document.encomenda.delivery_zipcode.disabled=false;
		document.encomenda.delivery_city.disabled=false;
	}
	
	return true;
}