function xmlhttp() {
	var xmlhttp;
	try{xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");}
	catch(e){
		try{xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");}
		catch(e){
			try{xmlhttp = new XMLHttpRequest();}
			catch(e){
				xmlhttp = false;
			}
		}
	}
	if (!xmlhttp) 
		return null;
	else
		return xmlhttp;
}

function sendAjaxPost(parametros, destino) {
	var ajax = xmlhttp();
	
	var A = document.getElementById('contenido');
	//var B = document.getElementById('loading');
	
	ajax.open("POST", destino, true);
	ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	ajax.onreadystatechange=function() 
	{
		//if(ajax.readyState==1 || ajax.readyState==3){
			//B.innerHTML = "<img src='includes/images/loading.gif' alg='Loading...'>";
		//}
		if(ajax.readyState==4){
			A.innerHTML = ajax.responseText;
			//B.innerHTML = "";
		}
	}
	ajax.send(parametros);	
}

function openWindow(arq, parametros) {
	//var parametros = null;
	sendAjaxPost(parametros, arq);
	return false;
}

function mudarMenu(id){
	var img = id+"2.jpg";
	var file = "imagem/geral/"+id;
	document.getElementById(id).src = "imagem/geral/"+img; 
}
function mudarMenuOut(id){
	var img = id+".jpg";
	var file = "imagem/geral/"+id;
	document.getElementById(id).src = "imagem/geral/"+img; 
}
function mudarbttplay(id){
	var img = id+"2.jpg";
	var file = "imagem/geral/"+id;
	document.getElementById(id).src = "imagem/geral/"+img; 
}
function mudarbttplayOut(id){
	var img = id+".jpg";
	var file = "imagem/geral/"+id;
	document.getElementById(id).src = "imagem/geral/"+img; 
}