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TODO intro The code/**
* Returns the position of an element relative to another element in the
* document. A relative to B
* @param {Element|Event} a Element or mouse event who's position we're
* calculating
* @param {Element|Event} b Element or mouse event position is relative to
* @return {goog.math.Coordinate}
*/
goog.style.getRelativePosition = function(a, b) {
var ap = goog.style.getClientPosition(a);
var bp = goog.style.getClientPosition(b);
return new goog.math.Coordinate(ap.x - bp.x, ap.y - bp.y);
};The code walkthroughTODO walkthrough Further readingTODO further reading
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