function CheckOnlineStatus() {
    //alert("client called");
    var sXmlHttp = createXMLHttpRequest();
    var BandID = document.getElementById("BandID").value;
    sXmlHttp.open("get", "ajax_band_online_status.aspx?bandid=" + BandID, true);
    sXmlHttp.onreadystatechange = function () 
    {
        if (sXmlHttp.readyState == 4) {
            // do stuff here
            //alert("Processing response");
            var onlineStatusSpan = document.getElementById("onlineStatus");                
            if (sXmlHttp.responseText == "a")
            {
                onlineStatusSpan.innerHTML = "[online]";
            }            
            else
            {
                onlineStatusSpan.innerHTML = "";
            }
            setTimeout("CheckOnlineStatus()", 30000);    
        }
    }
    sXmlHttp.send(null);
    //alert("sent");
}