function boxCarregando() {
	var span = document.createElement ("span"); 
	var img = document.createElement ("img"); 

	img.src = "images/loading.gif";
	span.id = "loading";
	img.align = "absmiddle";
	img.id = "carregando";
	img.style.display = '';
	
	document.getElementById('conteudo').appendChild(img);
}
function hideBox() {
	document.body.removeChild(carregando);
}