function audio_requester() {
    var http_request = false;
	//queryStr = queryStr.replace(/,/g, '&');

    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml'); 
        } 
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (e) {
            } 
        } 
    } 

    if (!http_request) {
        return false;
    } 
    var url = "/media/audio.php";
    //url += "?" + queryStr;
    http_request.onreadystatechange = function() {
        audio_alertContents(http_request);
    };
    http_request.open('GET', url, true);
    http_request.send(null);
} 

function audio_treatReply(response) {
	document.getElementById('audio_container').innerHTML = response;
}

function audio_alertContents(http_request) {
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            audio_treatReply(http_request.responseText);
        } else {
            alert('Request problem.');
        } 
    } 
}