function objXMLHttp(){

  if(window.XMLHttpRequest){
      var objetoXMLHttp = new XMLHttpRequest();
   return objetoXMLHttp;
  
  } else if(window.ActiveXObject){
      
   var versoes = [ "MSXML2.XMLHttp.6.0", " MSXML2.XMLHttp.5.0" , "MSXML2.XMLHttp.4.0" , "MSXML2.XMLHttp.3.0" , "MSXML2.XMLHttp" , "Microsoft.XMLHttp" ];
   
   for (var i = 0; i < versoes.length; i++){
     
   try{
       var objetoXMLHttp = new ActiveXObject(versoes[i]);
       return objetoXMLHttp;
   }catch (ex){
      // nada aqui
   }
   
   }
  
  
  }

      return false;
}