function switch_fv_description(id) {
	var fv_desc_div;
	fv_desc_div = document.getElementById('fvdescription' + id);
	if(fv_desc_div.style.display != 'block') {
		fv_desc_div.style.display = 'block';
	} else {
		fv_desc_div.style.display = 'none';
	}
}