position() and offset() of entities are always 0

[DomenicJahn]

My HTML contains an image with an attached click-listener. I'd like to retrieve the mouse clicks position relative to the image like

var X = (e.pageX - this.offsetLeft);
var Y = (e.pageY - this.offsetTop);

but the offset always returns 0. Is there a way to get the precise relative position of an entity in the document without substracting its precalculated position?

[lorikou]

This is an issue I have also been struggling with. Any possible help/pointers would be greatly appreciated!