var timerID = 0;
var tStart  = 5;
var tCurrent = 4;
var tResp = null;

function req(){
  var httpRequest;
  if(window.XMLHttpRequest)
    httpRequest = new XMLHttpRequest();
  else
    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
  

  httpRequest.open('GET', 'log/getlast.php', true);
  httpRequest.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
  httpRequest.onreadystatechange = function (evt) {
    if (httpRequest.readyState == 4) {
      tCurrent = httpRequest.responseText;

      if(tCurrent != tStart) {
        var hreq;
        if(window.XMLHttpRequest)
          hreq = new XMLHttpRequest();
        else 
          hreq = new ActiveXObject("Microsoft.XMLHTTP");

        hreq.open('GET', 'logtable.php', true);
        hreq.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
        //hreq.overrideMimeType('text/xml');

        hreq.onreadystatechange = function(evt) {
          if(hreq.readyState == 4){
            var g = document.getElementById('minilog');
            g.innerHTML = hreq.responseText;
            tStart = tCurrent;
          }
        };
        hreq.send(null);
      }//if 
    }//if readystate
  };
  httpRequest.send(null);
}

function UpdateTimer() {
   if(timerID) {
      clearTimeout(timerID);
      clockID  = 0;
   }

   req();
   timerID = setTimeout("UpdateTimer()", 5000);
}

function Start() {
   timerID  = setTimeout("UpdateTimer()", 5000);
}