var url;
var xmlHttp=null;
function showPag(str)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
url=str;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
if (xmlHttp.readyState == 1) {
document.getElementById("conteudo").innerHTML="<img src='loader.gif'> <br> <font face = 'verdana' color = 'CC0000' size = '2'> <b>Carregando...</b></font>";
}
return url;
}


function stateChanged()
{
if (xmlHttp.readyState==4 && xmlHttp.status == 200)
{
var resultado = document.getElementById("conteudo").innerHTML=xmlHttp.responseText;
}
}


function GetXmlHttpObject()
{
if (window.XMLHttpRequest) {  
           a=new XMLHttpRequest(); }
       else {  
         try {  
            a=new ActiveXObject("Msxml2.XMLHTTP");  
         }    
         catch(e) {  
           try {  
              a=new ActiveXObject("Microsoft.XMLHTTP");
           }    
           catch(e) {
              a=false;  
           }  
         }  
       }  
       return a;  
     }