// JavaScript Document
if(window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
function requestContent(url) {
xmlhttp.open("GET",url,true);
xmlhttp.onreadystatechange =statusListener;
xmlhttp.send(null);
}
function statusListener() {
if (xmlhttp.readyState == 1) {

        document.getElementById('pagina').innerHTML="<img src='media/loader.gif' />";
}

if (xmlhttp.readyState == 4) {
 document.getElementById('pagina').innerHTML=xmlhttp.responseText;

}

}