On 6 Geg, 14:48, Horst <my.list.subscripti...@gmail.com> wrote:
> I need to draw some markers interactively onto a background image on a
> web site.
> No sophistication - just a few dots of configurable pixel size, and
> lines (via mouse dragging).

just a hint
you could use http://processingjs.org/

i saw it used for quite similar UI
http://www.math.uiuc.edu/~rkirov2/processing/grapheditor.html
http://groups.google.com/group/sage-devel/browse_thread/thread/834be3b28bd7919f

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