var request = null;

try {
	request = new XMLHttpRequest();
	} catch (trymicrosoft) {
	try {
	request = new ActiveXObject("Msxm12.XMLHTTP");
	} catch (othermicrosoft) {
	try {
	request = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (failed) {
	request = null;
	}
	}
	}
	if(request == null)
	alert("Erro ao criar o objeto request");

	
function verificaBanners(valorurl,parametros) {
	
	var url = valorurl + "?" + parametros + "&horas=" + new Date().getTime();
	
	request.open("GET", url, true);
	request.onreadystatechange = verificaBanner;
	request.send(null);
	
}

function verificaBanner() 
{
	
	if( request.readyState == 4) 
	{
	
		if (request.status == 200) {
		
			var resposta = request.responseText;
			
			document.getElementById("conteudo").innerHTML = resposta;
			
			
		
		}
		
		else {
		
			alert("Erro! Request status é" + request.status);
		
		}
	
	}
	
	else {
		
		document.getElementById("conteudo").innerHTML = "Carregando...";
		
	}
	
}