var toggleUserLogoUploadField = function() {
	if ($('errorExplanation')) {
		$('errorExplanation').remove();
	}
	$$('.upload_field').invoke('toggle');
	$('asset_upload_form').reset();
}

var selectUserLogo = function(url, logo_id) {
	new Ajax.Request(url, {
		method: 'post',
		parameters: "user_logo_id=" + logo_id
	});
}