var n_img = 0;
var array_atual;
function proxImg(img_src, array_img, csss_img, caminho)
{
	if ((n_img+1) > (array_img.length-1))
		n_img = 0;
	else
		n_img = n_img + 1;
//	mostra(layer_img, array_img[n_img]);
	trocaImgLayer(img_src, caminho + array_img[n_img], csss_img[n_img]);
}
function imgAnt(img_src, array_img, csss_img, caminho)
{
	if ((n_img-1) < 0)
		n_img = (array_img.length-1);
	else
		n_img = n_img - 1;
	trocaImgLayer(img_src, caminho + array_img[n_img], csss_img[n_img]);
}
function trocaImgLayer()
{
	if (document.images)
	{
		document.getElementById(trocaImgLayer.arguments[0]).src = "imagens/produtos/carregando.gif";
		document.getElementById(trocaImgLayer.arguments[0]).className = trocaImgLayer.arguments[2];
		document.getElementById(trocaImgLayer.arguments[0]).src = trocaImgLayer.arguments[1];
	}
}

function mostra(id_layer, url_img)
{
	document.getElementById(id_layer).style.display = "block";
	document.getElementById('img_g').src = url_img;
}
function esconde(id_layer)
{
	document.getElementById('img_g').src = "imagens/fotos/carregando.gif";
	document.getElementById(id_layer).style.display = "none";
}