var urlink = "live_counter.php";
function ajax(urlink,targetID)
 {
    // native XMLHttpRequest object
   //document.getElementById(target).innerHTML = 'sending...';
   document.getElementById(targetID).innerHTML = '...';
   if (window.XMLHttpRequest) {
       req = new XMLHttpRequest();
       req.onreadystatechange = function() {ajaxDone(targetID);};
       req.open("GET", urlink, true);
       req.send(null);
   // IE/Windows ActiveX version
   } else if (window.ActiveXObject) {
       req = new ActiveXObject("Microsoft.XMLHTTP");
       if (req) {
           req.onreadystatechange = function() {ajaxDone(targetID);};
           req.open("GET", urlink, true);
           req.send();
       }
   }
         setTimeout("ajax(urlink,'scriptoutput')", 30000);
}

function ajaxDone(targetID) {
   // only if req is "loaded"
   if (req.readyState == 4) {
       // only if "OK"
       if (req.status == 200 || req.status == 304) {
           results = req.responseText;
           document.getElementById(targetID).innerHTML = results;
       } else {
           document.getElementById(targetID).innerHTML="ajax error:\n" +
               req.statusText;
       }
   }
}