// JavaScript Document
function objetoAjax(){
 var xmlhttp=false;
  try{
   xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
  }catch(e){
   try {
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
   }catch(E){
    xmlhttp = false;
   }
  }
  if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
   xmlhttp = new XMLHttpRequest();
  }
  return xmlhttp;
}

 var ajax = new objetoAjax();


function changeRss(id){
  ajax.open("GET","reader.php?rss_id="+id,true);
  ajax.onreadystatechange = function(){
  if (ajax.readyState == 1) {
	  var resp = document.getElementById('cajax');
	  resp.innerHTML ="<center><img src='loading.gif'></center>";
  }

  if (ajax.readyState == 4) {
	  var resp = document.getElementById('cajax');
	  resp.innerHTML = ajax.responseText;
  }
  
  
}
ajax.send(null)
}