var secs;
var timerID = null;
var timerRunning = false;
var delay = 30;

function InitializeTimer() {
    secs = 30;
    StopTheClock();
    StartTheTimer();
}

function StopTheClock() {
    if(timerRunning) {
        clearTimeout(timerID)
    }
    timerRunning = false
}

function StartTheTimer() {
    if (secs==0) {
        StopTheClock();
	sendReq("Statistics");
    }
    else {
        self.status = secs;
        secs = secs - 1;
        timerRunning = true;
        timerID = self.setTimeout("StartTheTimer()", delay);
    }
}

function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function sendReq(action) {
    http.open('get', 'ajax.php?action='+action);
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
        var update = new Array();

        if(response.indexOf('|' != -1)) {
            update = response.split('|');
            document.getElementById(update[0]).innerHTML = update[1];
        }
    }
}