function getHTTPObject() {
   var xmlhttp;
   /*@cc_on
        @if (@_jscript_version >= 5)
         try {
           xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
           try {
             xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {
             xmlhttp = false;
           }
         }
         @else
         xmlhttp = false;
   @end @*/
   if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
     try {
       xmlhttp = new XMLHttpRequest();
     } catch (e) {
       xmlhttp = false;
     }
   }
   return xmlhttp;
}
function handleHttpResponse(){
   if (http.readyState == 4) {
      document.getElementById("conteudo").innerHTML = http.responseText;
   }
}
var http = getHTTPObject();

function ajaxCommand(page, valor){
      document.getElementById("conteudo").innerHTML = "<br /><br /><br /><img src=\"./imgs/loading.gif\" alt=\"Carregando\" /><br /><br /> Carregando... aguarde...";
      http.open("GET", page+"?"+valor, true);
      http.onreadystatechange = handleHttpResponse;
      http.send(null);
         // Troca de banner
         r = document.getElementById('banner');
         valord = valor.split("&");
         switch(valord[0]){
            case "ajx=noticias": r.style.background = "url('imgs/banners/noticias.jpg') no-repeat"; break;
            case "ajx=empresa": r.style.background = "url('imgs/banners/empresa.jpg') no-repeat"; break;
            case "ajx=faleconosco": r.style.background = "url('imgs/banners/faleconosco.jpg') no-repeat"; break;
            case "ajx=suporte": r.style.background = "url('imgs/banners/suporte.jpg') no-repeat"; break;
            case "ajx=produtos": r.style.background = "url('imgs/banners/produtos.jpg') no-repeat"; break;
            default: r.style.background = "url('imgs/banners/main.jpg') no-repeat"; break;
         }
}