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 ajaxPong() {
    http.open('get', 'pong.htm');
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function ajaxHowToMovie() {
    http.open('get', 'bluebest.htm');
    http.onreadystatechange = handleResponse;
    http.send(null);
}


function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
		document.getElementById("pongCenter").innerHTML = response;
    }
}