function setvisibility (id, vis)
{
	var obj = document.getElementById(id);

	if (obj) obj.style.display = vis;
}

function isradiochecked (form, id, val)
{
	var result = false;
	var group = form[id];
	
	for (var i = 0 ; i < group.length ; ++i) 
	{
		var radio = group[i];
		if (radio.checked && radio.value == val) 
		{
			result = true;
			break;
		}
	}

	return result;
}

function updatevisibility()
{
	var form = document.getElementById('wilbos');
	
    var vis_verzend = !isradiochecked(form, 'verzendadresanders', 1) ? "none" : "";
    setvisibility('row_p_aanhef', vis_verzend)
    setvisibility('row_p_voorletters', vis_verzend);
    setvisibility('row_p_tussenvoegsel', vis_verzend);
    setvisibility('row_p_achternaam', vis_verzend);
    setvisibility('row_p_adres', vis_verzend);
    setvisibility('row_p_postcode', vis_verzend);
    setvisibility('row_p_woonplaats', vis_verzend);
    setvisibility('row_p_telefoon', vis_verzend);
    setvisibility('row_p_email', vis_verzend);

	var showthis = true;
	var showfirstno = true;	
	for (var i=2; i<=6; i++)
	{
		showthis = isradiochecked(form, 'o'+i+'_aanvraag', 1);

		var showselect = showthis;
		if (!showthis && showfirstno)
		{
			showselect = true;
			showfirstno = false;
		}
		
		var vis_select = showselect ? "" : "none";
		setvisibility('row_o'+i+'_aanvraag', vis_select);
		
		var vis_fields = showthis ? "" : "none";				
		setvisibility('row_o'+i+'_naam', vis_fields)
		setvisibility('row_o'+i+'_datum', vis_fields);
		setvisibility('row_o'+i+'_jaar', vis_fields);
	}

	var multi = isradiochecked(form, 'o2_aanvraag', 1);
	setvisibility ('row_submit1', multi ? "none" : "");
	setvisibility ('row_submitN', multi ? "" : "none");
	
	// Enquete
	var vis_enquete = isradiochecked(form, 'enquete', 1) ? "" : "none" ;

    setvisibility('q_enq_vraag1', vis_enquete) ;
    setvisibility('row_enq_vraag1', vis_enquete) ;
    setvisibility('q_enq_vraag2', vis_enquete) ;
    setvisibility('row_enq_vraag2', vis_enquete) ;
    setvisibility('q_enq_afsluiting', vis_enquete) ;

}


function openEnqueteInfo()
{
	window.open('onderzoek.html', '_blank', 'directories=no,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no,width=400,height=600');
}