var req;

function abre(ident){
	document.getElementById(ident).style.visibility='visible';
}

function fecha(ident){
	document.getElementById(ident).style.visibility='hidden';
}

function loadXMLDoc(url)
{
    req = null;
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}

function processReqChange()
{
	document.getElementById('MostraConteudo').innerHTML = "<p><img src='im/ajax-loader.gif' /></p>Carregando..."; 
    if (req.readyState == 4) {
        if (req.status == 200) {
            document.getElementById('MostraConteudo').innerHTML = req.responseText; 
        } else {
			document.getElementById('MostraConteudo').innerHTML = "<font face='arial, verdana' size='2'>Página não encontrada!</font>"; 			
		}
    }
}

function MostraConteudo(pagina)
{
	var pagina;
    loadXMLDoc(pagina + ".php");
}

function vaiLinks(pagina, vars)
{
	var pagina;
	var vars;
    loadXMLDoc(pagina + ".php" + vars);
}