Get HTML X,Y & SVG X,Y Values with Offsets

Assume the SVG image is contained in a DIV inline within the HTML5 document. The HTML clientX/clientY position is identical the svg clientX/clientY values. Neither are useful unless they have been adjusted with offsets,
Note: in svg evt is an event object. But, in HTML event is the event object.
SVG image is inline, contained in a DIV.
A circle is located with its center at svg(200,200)
HTML clientX/Y
html X: :html Y
SVG clientX/Y:
svg X: :svg Y
HTML clientX/Y + Scroll offset
html X: :html Y
SVG clientX/Y - DIV offset
svg X: :svg Y

SVG Source: