//-- CONFIGURAR ASPECTO DO LOADER --------//
var loader  = '<div align="center" style="padding:100px 0px 0px 0px;"><img style="vertical-align: middle; border: none;" src="images/loading.gif" alt=""/><b>&nbsp;A carregar...</b></div>';
//----------------------------------------//

function ajax_carregar_pagina(pagina, divid) {
 try {
   xmlhttp = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
 }  
catch (e) { 
  alert("Erro: Não foi possivel carregar a página");
 }
        
 document.getElementById(divid).innerHTML = loader;
 scroll(0,0);
        
 xmlhttp.onreadystatechange = function(){
    if ((xmlhttp.readyState == 4) && (xmlhttp.status == 200)) {
     document.getElementById(divid).innerHTML = xmlhttp.responseText;
    }
 }
 
 xmlhttp.open("GET", pagina);
 xmlhttp.send(null);
 return false;
}