var req;

function loadXMLDoc(url,valor){ 

	req = null; 

	if (window.XMLHttpRequest) { 

		req = new XMLHttpRequest(); 

		req.onreadystatechange = processReqChange; 

		req.open("GET", url+'?tipo='+valor, true); 

		req.send(null);

	} else if (window.ActiveXObject) { 

		req = new ActiveXObject("Microsoft.XMLHTTP"); 

		if (req) { 

			req.onreadystatechange = processReqChange; 

			req.open("GET", url+'?tipo='+valor, true); 

			req.send();

		}

	}

}



function processReqChange() {

	if(req.readyState == 4){

		if (req.status == 200) {

			document.getElementById('Layer8').innerHTML = req.responseText;

		} else { 

			alert("Houve um problema ao obter os dados:\n" + req.statusText);

		}

	}

}



function Atualiza(valor){

	if(valor == 'nenhum'){

		document.getElementById('servico').innerHTML = '';

	}else{

		loadXMLDoc("conteudo.php",valor);

	}

}



function loading() {

	document.getElementById('Layer8').innerHTML = '<div id="fundo1copy" style="left: 150px; top: 50px; height: 100px; width: 100px;"><img src="img/carregando.gif" border="0" /></div>';

}// JavaScript Document