notes-20160804a: Taking the HTML produced by PowerPoint and keeping only the text

Putting in the output directly from saving the PowerPoint as HTML, keeping only the text, looks like the following in the HTML editor:

<div class="T" style="position: absolute; top: 14.44%; left: 17.74%; width: 76.02%; height: 5.81%;"><span style="color: #c00000;">Module 1:<span style="width: 3.72%;"> </span></span>Introduction<span style="display: none;"> </span></div>
<div>
<div class="B" style="position: absolute; top: 30.2%; left: 17.74%; width: 76.02%; height: 4.5%;">Lecture notes of G. Q. Maguire Jr.</div>
<div class="B"><span style="position: absolute; top: 35.83%; left: 17.74%; width: 76.02%; height: 4.5%;"><br /></span><span style="position: absolute; top: 40.52%; left: 17.74%; width: 76.02%; height: 4.5%;">For use in conjunction with: </span></div>
<div class="B2"><span style="position: absolute; top: 45.96%; left: 21.45%; width: 72.18%; height: 4.5%;"><span style="display: none;">&ndash;</span>Henry Sinnreich and Alan B. Johnston,<i> Internet </i></span><span style="position: absolute; top: 50.65%; left: 21.45%; width: 72.18%; height: 4.5%;"><i>Communications Using SIP: Delivering VoIP and </i></span><span style="position: absolute; top: 55.34%; left: 21.45%; width: 81.98%; height: 4.5%;"><i>Multimedia Services with Session Initiation Protocol</i>, 2nd </span><span style="position: absolute; top: 60.03%; left: 21.45%; width: 73.77%; height: 4.5%;">Edition, Wiley, August 2006, ISBN: 0-471-77657-2. </span></div>
<div class="B" style="position: absolute; top: 65.47%; left: 17.74%; width: 76.02%; height: 4.5%;"><span style="display: none;"> </span></div>
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Looks like the following after saving in the editor: