function update(nr, tab, archief){
	new Ajax.Updater('artikel_' + nr + '_wissel', 'update_artikel.php', {
		parameters: { nr:nr, tab:tab, archief: archief }
	});
}

function toggle_visibility(art_nr) {
	$('artikel_main_' + art_nr).toggle();
	//Effect.toggle('artikel_main_' + art_nr, 'blind', { duration: 2.0 }); 
	var test = $('artikel_main_' + art_nr).getStyle('display');
	//alert($('art_header_' + art_nr).getStyle('background-image'));
	switch (test){
	case 'none':
	$('art_header_' + art_nr).setStyle({backgroundImage: 'url(layoutpix/plus.gif)'});
	break;
	case 'block':
	$('art_header_' + art_nr).setStyle({backgroundImage: 'url(layoutpix/min.gif)'});
	break;	
	}
}

function verwerk_reservering(nr) {
	new Ajax.Updater('artikel_' + nr + '_wissel', 'bestellen.php', {
  parameters: $('reservering_form').serialize()
});
}

function checkEmailInBestand(email){
	//alert(email);
	var url='is_email_in_mailinglist.php';
	pars = 'email=' + email;
	
	new Ajax.Request(url,{
		method: 'get',
		parameters: pars,
		onComplete: showResponse
	});
}

function showResponse(originalRequest)
	{
		$('opt_in').enable();//even ter debuggen
		if(originalRequest.responseText == "gevonden"){
			$('opt_in').disable();
			$('opt_in_text').update("U staat reeds bij ons geregistreerd.");
		};
	}