Main Page of div_overlay_navigation.html - RJM Programming - December, 2016 ... "overlay" advantages of document.body.innerHTML (totally) being a "jigsaw" of HTML div elements ... bit like Ajax in advantages of not navigating to new webpage, yet all the underlying Javascript DOM possibilities of non-showing pages is available for use, as is the dynamic way those non-showing, or showing pages can be changed (to the extent of even being blanked out) by Javascript DOM techniques