function getAjax(){
	ajax = null;
	try{
		ajax = new XMLHttpRequest();
		}catch(e){
			try{
				ajax = new ActiveXObject("Microsoft.XMLHttp");
			}catch(e){
				try{
					ajax = new ActiveXObject("MSXML2.XMLHttp");
				}catch(e){
					alert("Seu navegador não suporta Ajax");
				}
			}
	    }
	return ajax;
}

var http = getAjax();

function page(page){
	http.open('GET',page+'.php',true);
	http.onreadystatechange=subtroca;
	http.send(null);
}

function pageVar(page,vr){
	http.open('GET',page+'.php?var='+vr,true);
	http.onreadystatechange=subtroca;
	http.send(null);
}

function getFotosDet(page,vr,pic,leg){
	http.open('GET',page+'.php?var='+vr+'&foto='+pic+'&leg='+leg,true);
	http.onreadystatechange=function(){
	if(http.readyState==4){
		document.getElementById('cont').innerHTML = http.responseText;
		document.getElementById('pict').src="fotos/"+pic;
		document.getElementById('pict').alt=leg;
	}
}

	http.send(null);
}


function subtroca(){
	if(http.readyState==4){
		document.getElementById('cont').innerHTML = http.responseText;
	}
}