function getXmlHttp(){
    var xmlhttp;
    try {
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
       try {
       xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
       } catch (E) {
          xmlhttp = false;
       }
    }
    if (!xmlhttp && typeof XMLHttpRequest!="undefined") {
       xmlhttp = new XMLHttpRequest();
    }
    return xmlhttp;
}

function update5() {
    var xmlhttp = getXmlHttp()
    xmlhttp.open("GET", "dbitva-banz.php", true);
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
            if(xmlhttp.status == 200) {
                document.getElementById("banz7777").innerHTML = xmlhttp.responseText;      
            }
        }
    };
    xmlhttp.send(null);
}

var time4 = 15000; 
setInterval("update5()", time4);

update5();