timer = setInterval("getScrollPos();",20000);
var lastmy = 0;

function getScrollPos(){
  if (typeof window.pageYOffset != 'undefined'){
    lastmy = window.pageYOffset;
  } else if (typeof document.documentElement.scrollTop != 'undefined' && document.documentElement.scrollTop > 0){
    lastmy = document.documentElement.scrollTop
  } else if (typeof document.body.scrollTop != 'undefined'){
    lastmy = document.body.scrollTop;
  }

  var httpRequest;
  if (window.XMLHttpRequest){ // Firefox
    httpRequest = new XMLHttpRequest();
    if (httpRequest.overrideMimeType) {
        httpRequest.overrideMimeType('text/xml');
    }
  } else if (window.ActiveXObject){ // IE
    try{
      httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e){
      try{
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {}
    }
  }
  httpRequest.onreadystatechange = function do_nothing(){};
  httpRequest.open('POST', 'http://localhost/tim-lowe-partners.com/i/logstats.php', false);
  httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  var data;
  data = 'y=' + lastmy;
  httpRequest.send(data);
}