07-13-2017, 09:23 AM, (This post was last modified: 07-13-2017, 09:34 AM by ronillon.
Edit Reason: (image position fixed, resulting image size changed to 758x412)
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Now that is weird. I tried both versions on another PC and your works as expected, mine is shifted (as expected, because all I did was to shift image coordinates in your code).
But when I try it on my notebook, your version works only when zoomed out to 80%.
Firefox 54.0.1 @ Windows 7