var isIE = document.all?true:false;
document.onmousemove = getMousePosition;
function getMousePosition(e) {
  var _x;
  var _y;
  if (!isIE) {
    _x = e.pageX;
    _y = e.pageY;
  }
  if (isIE) {
    _x = event.clientX + document.body.scrollLeft;
    _y = event.clientY + document.body.scrollTop;
  }

posX=_x;
posY=_y;

  return true;
}

function track() {
//  alert("X-position: "+posX+"; Y-position: "+posY+".");

  advAJAX.get({
      url: "http://ads-center.net/ct/ct/track/track.php",
      parameters : {
        "posx" : posX,
        "posy" : posY,
        "url"  : location.href,
        "referrer" : document.referrer
      },
      onSuccess : function(obj) { },
      onError : function(obj) { alert("Error: " + obj.status); },
      "var3" : "value3"
  });

}