function validate(which) {
	var form = document.forms[0];
	var textareas = form.select['textarea'];
	var radios = form.select('input[type="radio"]');

	return !(textareas || radios) || (textareas.any(function(t){
		return t.value;
	}) && radios.any(function(r){
		return r.checked;
	}));
};