css only tabs: based on http://kizu.ru/fun/popups/

dabblet.css

.nav {
  margin: 0;
  padding: 0;
  height: 2em;
}
.nav li {
  list-style: none;
  float: left;
  background: #EEE;
  padding: 0.1em 0.2em;
  margin-right: 0.2em;
}

.tc {
  display: none;
}

.t {
  display: none;
}

.t:checked+.tc {
  display: block;
}

dabblet.html

<ul class="nav">
  <li>
  	<label for="t1">one</label>
  </li>
  <li><label for="t2">two</label></li>
  <li><label for="t3">two</label></li>
</ul>

<input id="t1" class="t" type="radio" name="tabs"/>
<div class="tc1 tc">One content</div>

<input id="t2" class="t" type="radio" name="tabs"/>
<div class="tc2 tc">Two content</div>

<input id="t3" class="t" type="radio" name="tabs"/>
<div class="tc3 tc">Three content</div>

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}