 id="btnNoTooltip">but not me</button>
  </p>

  <p>
    Demo <span id="txt1">tooltips</span> in text and and of <span id="txt2">nested
    <span id="txt3">tooltips</span>, where an element triggers
    one tooltip and an element inside the first element triggers another
    one.</span>
  </p>

  <div style="overflow: auto; height: 100px; border: 1px solid black;">
  <div style="margin: 5px; padding: 5px; height: 200px;">
    <button id="btn4">and me too!</button>
  </div>
  </div>

  <button id="btn5" styl