function trim (str) {
	while (str.charAt (str.length - 1) == " ")
		str = str.substring (0, str.length - 1);
	while (str.charAt (0) == " ")
		str = str.substring (1, str.length);
	return str;
}

function pop (foto) {
	window.open ('modulos/pop.php?' + foto, 'pop', 'top=1,left=1,width=1,height=1,status=no,resizable=no,location=no,toolbar=no,directories=no,menubar=no');
	return false;
}

function validaBusca () {
	if (trim (document.form.busca.value) == "")
		return false;
	else
		return true;
}