Pan | Zoom: how to get image offsets when panning

Hello,
I am trying to use the Pan | Zoom control to show images, allowing zoom and pan. I haven't found yet a way to infer the X,Y offset of the part of the image that it's displayed in the imageviewer visible rectangle. I need these details in order to print objects and markers at the right place over the image.
Is there some hidden or simple way to get these informations?
Thanks,
Mario

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>
i worked with apex 4.2 and i create normal classic report with one checkbox column and one column change it to select list(named loved) now i want when user change list
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>
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>
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{code}
{quote}
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