var newurl;
var newdiv;
var listenerClient;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    listenerClient = new XMLHttpRequest();
}
else if (window.ActiveXObject) { // IE
    listenerClient = new ActiveXObject("Microsoft.XMLHTTP");
}

listenerClient.onreadystatechange = listenerHandler;

function startListenerUpdate(){
    listenerClient.open("GET", "radiostatus_main.php", true);

    listenerClient.send(null);
}

function listenerHandler() {
    if(listenerClient.readyState == 4 && listenerClient.status == 200) {
        if(listenerClient.responseText != null) {
            updateListenerDiv(listenerClient.responseText);
        }
        else {
            return 0;
        }
    }
    else {
        return 0;
    }
}
function updateListenerDiv(data) {
    var divListener=document.getElementById("left_radiostats");
    divListener.innerHTML=data;

    if (window.XMLHttpRequest) { // Mozilla, Safari, ...
        listenerClient = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) { // IE
        listenerClient = new ActiveXObject("Microsoft.XMLHTTP");
    }

    listenerClient.onreadystatechange = listenerHandler;
    setTimeout("startListenerUpdate()",30000);
}