var req;
var linha;
function loadXMLDoc(url, valor)
{
 	req = null;
	linha = valor;
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
		req.onreadystatechange = processReqChange;
		req.open("GET", url, true); 
		req.send(null);
	} else if (window.ActiveXObject) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP.4.0");
		} 
		catch(e) {
			try {
				req = new ActiveXObject("Msxml2.XMLHTTP.3.0");
			} 
			catch(e) {
				try {
					req = new ActiveXObject("Msxml2.XMLHTTP");
				} 
				catch(e) {
					try {
						req = new ActiveXObject("Microsoft.XMLHTTP");
					} 
					catch(e) {
						req = false;
					}
				}
			}
		}
		if (req) {
	 		req.onreadystatechange = processReqChange;
	 		req.open("GET", url, true);
	 		req.send();
		}
	}
}

function processReqChange(){
	if (req.readyState == 4) {
		if (req.status == 200) {
			document.getElementById("banner").innerHTML = req.responseText;
		} else {
			alert("Houve um problema ao obter os dados:\n" + req.statusText);
		}
	}
}

function chamaNews(){
	document.getElementById("formContato").style.display = "none";
	document.getElementById("banner").innerHTML = "<br /><br /><h1>Carregando...</h1><br /><img src='images/loading.gif' />";
	loadXMLDoc("news.php");
}

function chamaContato(){
	document.getElementById("contato").innerHTML = "<br /><br /><h1>Carregando...</h1><br /><img src='images/loading.gif' />";
	loadXMLDoc("contato.php");
}