// Event-Handler für den Klick (onmousedown)


// Detect if the browser is IE or not.
// If it is not IE, we assume that the browser is NS.
var IE = document.all?true:false

// If NS -- that is, !IE -- then set up for mouse capture
if (!IE) document.captureEvents(Event.MOUSEMOVE)

// Set-up to use getMouseXY function onMouseMove
document.onmousemove = getMouseXY;

// Temporary variables to hold mouse x-y pos.s
var tempX = 0
var tempY = 0

// Main function to retrieve mouse x-y pos.s

function getMouseXY(e) {
  if (IE) { // grab the x-y pos.s if browser is IE
    tempX = event.clientX + document.body.scrollLeft
    tempY = event.clientY + document.body.scrollTop
  } else {  // grab the x-y pos.s if browser is NS
    tempX = e.pageX
    tempY = e.pageY
  }  
  // catch possible negative values in NS4
  if (tempX < 0){tempX = 0}
  if (tempY < 0){tempY = 0}  
  // show the position values in the form named Show
  // in the text fields named MouseX and MouseY
  document.Show.MouseX.value = tempX
  document.Show.MouseY.value = tempY
  return true
}

function hm_logClick(e)
{
    // Event-Variable holen falls nötig
    if (!e) e = window.event;
    // Klickposition auslesen
    if (IE)
    {
        // Rechtsklick wird ignoriert
        if (typeof(e.button) != 'undefined' && e.button == 2) return;
        
        clickX = e.clientX + document.body.scrollLeft
        clickY = e.clientY + document.body.scrollTop
    }
    else
    {
        // Rechtsklick wird ignoriert
        if (typeof(e.which) != 'undefined' && e.which == 3) return;
        
        clickX = e.pageX
        clickY = e.pageY
    }
    // Klick-Daten an PHP-Script übergeben
    var url='hc.php?x=' + clickX + '&y=' + clickY;
    hm_sendClickAjaxReq(url);
    // true zurückgeben, damit das Event weiterverarbeitet wird
    return true;
}

// Funktion, die eine URL per AJAX aufruft ohne Rückgabewerte o.ä. zu beachten
function hm_sendClickAjaxReq(url)
{
    // AJAX-Objekt konstruieren
    var ajaxRequest;
    if (typeof(window.ActiveXObject) == 'undefined')
        ajaxRequest = new XMLHttpRequest();
    else
        ajaxRequest = new ActiveXObject('Microsoft.XMLHTTP');
    // AJAX-Request senden
    ajaxRequest.open('GET', url, true);
    ajaxRequest.send(null);
}

// Variable um den IE zu erkennen
var IE = document.all ? true : false
// onmousedown-Event-Handler registrieren
if (!IE) document.captureEvents(Event.MOUSEMOVE)
document.onmousedown = hm_logClick;