prendere le coordinate in una immagine

[floyd]

  var mouseX, mouseY;
  if (event.layerX) {
    mouseX = event.layerX;
    mouseY = event.layerY;
  } else {
    mouseX = event.offsetX;
    mouseY = event.offsetY;
  }
  alert("x = " + mouseX + " y = " + mouseY);

testato con ff, ie e opera