var reqcarrinho;
function listarcarrinho() {
	showCarrinho();
	document.getElementById("divcarrinho").innerHTML = "atualizando carrinho...";
	var url="listarcarrinho.php";
	url=url;
	if(window.XMLHttpRequest) {
		reqcarrinho = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
		reqcarrinho = new ActiveXObject("Microsoft.XMLHTTP");
	}
	reqcarrinho.open("GET", url, true);
	reqcarrinho.onreadystatechange = retorno;
	reqcarrinho.send(null);
}

function retorno() {        
	obj = getObject("divcarrinho");
	if(reqcarrinho.readyState == 4) {
		resposta = reqcarrinho.responseText;
		obj.innerHTML = resposta;

	}
}
function getObject(obj) {
	var o;
	if(document.getElementById) o = document.getElementById(obj);
	else if(document.all) o = document.all.obj;	
	return o;	
}

function showCarrinho() {
	getObject("divcarrinho").style.display = "block";
}
function hideCarrinho() {
	getObject("divcarrinho").style.display = "none";
}