var treadsAjax=0;
function loader(valor,id){
  if(valor=="block")treadsAjax++;
  if(valor=="none"&&treadsAjax>0)treadsAjax--;
  if(treadsAjax>0){
    document.getElementById(id).style.display="block";
  }else{
    document.getElementById(id).style.display="none";
  }
}

function XMLHTTPRequest() {
           if (window.XMLHttpRequest) {
               a=new XMLHttpRequest(); } //Objeto nativo (FF/Safari/Opera7.6+)
           else {
             try {
                a=new ActiveXObject("Msxml2.XMLHTTP");  //activeX (IE5.5+/MSXML2+)
             }   
             catch(e) {
               try { 
                  a=new ActiveXObject("Microsoft.XMLHTTP"); //activeX (IE5+/MSXML1)
               }   
               catch(e) { /* O navegador npo tem suporte */ 
                  a=false;
               }     
             }
           }
           return a;
         }
function ajaxinc(file,id){
  try{
    var http_request = XMLHTTPRequest();
    http_request.onreadystatechange = function() {
						      if (http_request.readyState == 4) {
						         if (http_request.status == 200) {
	                      document.getElementById(id).innerHTML = http_request.responseText;
	                      correctPNG();
	                      return true;
						         } else {
						            return false;
                    }
						      }
						   };
    http_request.open('GET', file, false);
    http_request.send();
  }   
  catch(e) {
    return false;
  }
}

function ajaxincp(file,id){
  try{
    var http_request = XMLHTTPRequest();
    http_request.onreadystatechange = function() {
						      if (http_request.readyState == 4) {
						         if (http_request.status == 200) {
	                      document.getElementById(id).innerHTML += http_request.responseText; 
	                      correctPNG();
	                      return true;
						         } else {
						            return false;
                     }
						      }
						   };

    http_request.open('GET', file, false);
    http_request.send();
       
  }   
  catch(e) {
    return false;
  }
}
function faleconosco(){
  try{
    var nome = document.getElementById('nome').value;
    var inscricao = document.getElementById('inscricao').value;
    var telefone = document.getElementById('telefone').value;
    var email = document.getElementById('email').value;
    var comentario = document.getElementById('comentario').value;
    var param="nome="+nome+"&inscricao="+inscricao+"&telefone="+telefone+"&email="+email+"&comentario="+comentario;
    var http_request = XMLHTTPRequest();
    http_request.onreadystatechange = function() {
						      if (http_request.readyState == 4) {
						         if (http_request.status == 200) {
	                      document.getElementById('resp').innerHTML = http_request.responseText;
	                      correctPNG();
						         } else {
						            var x=window.confirm("Configure se navegador para usar AJAX.\nSe vocO necessita de ajuda pressione OK?");
                        if (x)window.open("http://www.google.com.br/search?hl=pt-BR&q=configurar+ajax&btnG=Pesquisa+Google&meta=");
                    }
						      }
						   };
    http_request.open('get', 'mail.php?'+param, false);
    http_request.send();
  }   
  catch(e) {
    var x=window.confirm("Configure se navegador para usar AJAX.\nSe vocO necessita de ajuda pressione OK?");
    if (x)window.open("http://www.google.com.br/search?hl=pt-BR&q=configurar+ajax&btnG=Pesquisa+Google&meta=");
  }
}


function mostrar(item) {
  obj=document.getElementById(item);
  obj.style.display="block";
}
function esconder(item) {
  obj=document.getElementById(item);
  obj.style.display="none";
}


/*
var sistemaOK = false;
var mensagem = "";
function verificaNavegador(){
  var ie6 = navigator.userAgent.indexOf("MSIE 6.0") != -1;
  var ie7 = navigator.userAgent.indexOf("MSIE 7.0") != -1;
  var ff = navigator.userAgent.indexOf("Firefox") != -1;
  var ok = false;
  if (ie6 == true || ie7 == true || ff == true ){
     ok=true;
  }else{
     alert("Este navegador npo suportado pelo sistema.\n Os navegadores compatfveis spo: Internet explorer 6.0 (ou superior) ou Mozilla Firefox.";
  }
  return ok;
}
function verificaResolucaoTela(){
  var ok = false;
  var width = screen.width;
  var height = screen.height;
  if (width >= 800 && height >= 600 ){
     ok=true;
  }else{
     alert("Para utilizar o sistema a resolutpo mfnima do seu monitor deve ser de 800x600.";
  }
  return ok;
}
*/