var mouse_x;
var mouse_y;
var m_x;
var m_y;

Event.observe(document, 'mousemove', function(event) {
  var offset = Position.cumulativeOffset($("startpos"));

  mouse_x = event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));
  mouse_y = event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop));

  m_x = mouse_x - offset[0];
  m_y = mouse_y - offset[1];

});

Event.observe(document, 'mousedown', function(event) {
  if (clickMonPageId == undefined)
    return;

  var url = '/ajax/clickMonitor.php';
  var pars = 'x=' + m_x + '&y=' + m_y + "&z=" + clickMonPageId;

  var myAjax = new Ajax.Request(
    url,
    {
      method: 'get',
      parameters: pars,
      onComplete: showResponse
    });
  });

function showResponse(originalRequest)
{
//  alert(originalRequest.responseText);
}