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Added book viewer
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!--
Copyright (c) 2012 Jeff Kent, https://jeffkent.net/

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-->
<html>
<head>
<title>6.002x Textbook for Kindle</title>
<script type="text/javascript" src="https://mitxstatic.s3.amazonaws.com/js/jquery-1.6.2.min.js"></script>
<script type="text/javascript" src="/static/js/jquery.cookie.js"></script>
<script type="text/javascript">
var exhibit = Object();
exhibit.width = 960;
exhibit.height = 1080;
exhibit.ratio = exhibit.width / exhibit.height;
exhibit.current = 1;
exhibit.first = 1;
exhibit.last = 1008;
exhibit.url = "https://mitxstatic.s3.amazonaws.com/book_images/p{0}.png";
exhibit.format = Array();
exhibit.format[0] = {width: 550,
                     height: 975,
                     left_odd: -117,
                     left_even: -295,
                     top: -55,
                     ratio: 550/975};
exhibit.format[1] = {width: 775,
                     height: 975,
                     left_odd: -117,
                     left_even: -70,
                     top: -55,
                     ratio: 775/975};
exhibit.format[2] = {width: 960,
                     height: 1080,
                     left_odd: 0,
                     left_even: 0,
                     top: 0,
                     ratio: 960/1080};

var format_mode = 0;

function zeropad(num, size){
  var s = num+"";
  while (s.length < size)
    s = "0" + s;
  return s;
}

function load(n){
  var pg = 0;
  if (exhibit.current <= 1)
    pg = exhibit.current + n;
  else if (exhibit.current < exhibit.last)
    pg = exhibit.current - 1 + n;
  else
    pg = exhibit.last - 2 + n;

  var url = exhibit.url.replace("{0}", zeropad(pg, 3));
  var div = $("#exhibit" + n);
  var img = $("#exhibit" + n + " img");
  div.css({width:exhibit.format[format_mode].width + "px",
           height:exhibit.format[format_mode].height + "px"});
  img.css({position:"relative",
           width:exhibit.width + "px",
           height:exhibit.height + "px",
           top:exhibit.format[format_mode].top + "px"});
  if (pg % 2)
    img.css({left:exhibit.format[format_mode].left_odd + "px"});
  else
    img.css({left:exhibit.format[format_mode].left_even + "px"});
  img.attr("src", url);
}

function load_all(){
  if (exhibit.current <= 1) {
    load(0);
    load(1);
    load(2);
  } else {
    load(1);
    load(2);
    load(0);
  }
}

function shift_up(){
  $("#exhibit0").html("");
  $("#exhibit1 img").appendTo("#exhibit0");
  $("#exhibit1").html("");
  $("#exhibit2 img").appendTo("#exhibit1");
  $(window).scrollTop($(window).scrollTop() - exhibit.format[format_mode].height - 15);
  $("#exhibit2").html("<img>");
  load(2);
}

function shift_down(){
  $("#exhibit2").html("");
  $("#exhibit1 img").appendTo("#exhibit2");
  $("#exhibit1").html("");
  $("#exhibit0 img").appendTo("#exhibit1");
  $(window).scrollTop($(window).scrollTop() + exhibit.format[format_mode].height + 15);
  $("#exhibit0").html("<img>");
  load(0);
}

function update_status(){
  $("#status").html("&nbsp; " + exhibit.current + "/" + exhibit.last);
}

function goto_page(pg, offset){
  offset = typeof offset !== 'undefined' ? offset : 0;

  exhibit.current = pg;
  load_all();
  if (exhibit.current <= 1)
    $(document).scrollTop(offset);
  else if (exhibit.current < exhibit.last)
    $(document).scrollTop((exhibit.format[format_mode].height + 15) + offset);
  else
    $(document).scrollTop((exhibit.format[format_mode].height + 15) * 2 + offset);

  $.cookie('exhibit.current', exhibit.current, {expires: 7});
  $.cookie('exhibit.offset', 0, {expires: 7});
}

function get_offset(){
  var offset;

  if (exhibit.current <= 1)
    offset = $(document).scrollTop();
  else if (exhibit.current < exhibit.last)
    offset = $(document).scrollTop() - (exhibit.format[format_mode].height + 15);
  else
    offset = $(document).scrollTop() - (exhibit.format[format_mode].height + 15) * 2;

  return offset;
}

$(function(){
  $("#container").width(exhibit.format[format_mode].width);
  setTimeout(function(){
    var current = parseInt($.cookie("exhibit.current"),10);
    var offset = parseInt($.cookie("exhibit.offset"),10);
    current = (isNaN(current) || current < 1 || current > exhibit.last) ? 3 : current;
    offset = isNaN(offset) ? 0 : offset;

    goto_page(current, offset);
    update_status();
  },1);
});

$(window).keydown(function(e){
  if (e.keyCode == 67) {        /* [c]ontents */
    goto_page(9);
  } else if (e.keyCode == 70) { /* [f]ormat */
    if (format_mode < 2)
      format_mode += 1;
    else
      format_mode = 0;
    $("#container").width(exhibit.format[format_mode].width);
    load_all();
  } else if (e.keyCode == 71) { /* [g]oto */
    var pg = prompt("Goto page: ");
    if (pg !== null)
      if (pg > 0 && pg <= exhibit.last)
        goto_page(parseInt(pg,10));
  } else if (e.keyCode == 73) { /* [i]ndex */
    goto_page(997);
  }
});

$(window).scroll(function(){
  setTimeout(function(){
    if (exhibit.current <= 1) {
      if ($(window).scrollTop() + $(window).height()/2 >= (exhibit.format[format_mode].height + 15))
        exhibit.current += 1;
    } else if (exhibit.current <= exhibit.last - 1) {
      if ($(window).scrollTop() + $(window).height()/2 < (exhibit.format[format_mode].height + 15)) {
        exhibit.current -= 1;
        if (exhibit.current != 1)
	  shift_down();
      } else if ($(window).scrollTop() + $(window).height()/2 >= (exhibit.format[format_mode].height + 15) * 2) {
        exhibit.current += 1;
        if (exhibit.current != exhibit.last)
	  shift_up();
      }
    } else if (exhibit.current >= exhibit.last) {
      if ($(window).scrollTop() + $(window).height()/2 < (exhibit.format[format_mode].height + 15) * 2)
        exhibit.current -= 1;
    }
    $.cookie('exhibit.current', exhibit.current, {expires: 7});
    $.cookie('exhibit.offset', get_offset(), {expires: 7});
    update_status();
  },1);
});
</script>
<style type="text/css">
body {
  background-color: #333;
  margin: 15px 0;
}
#status {
  position: fixed;
  bottom: 0;
  left: 0;
  background-color: black;
  color: white;
  width: 100%;
  z-index: 100;
}
#help {
  position: fixed;
  bottom: 0;
  right: 0;
  color: white;
  z-index:100;
}
#container {
  overflow: hidden;
  margin: 0 auto;
}
#exhibit0, #exhibit1, #exhibit2 {
  overflow:hidden;
}
.spacer {
  height: 15px;
}
</style>
</head>
<body>
<div id="container">
<div id="exhibit0"><img /></div>
<div class="spacer"></div>
<div id="exhibit1"><img /></div>
<div class="spacer"></div>
<div id="exhibit2"><img /></div>
</div>
<div id="status">&nbsp;</div>
<div id="help">[g]oto [f]ormat [c]ontents [i]ndex &nbsp;</div>
<div>&nbsp;<div>
</body>
</html>