title: How can I dynamically change the text of a tooltip with Javascript?
body: <p>I'm new to Javascript, and wish to change the text of a tooltip with Javascript.  </p>
  
  <p>I've had a search around the questions but can't seem to find anything illuminating.</p>
  
  <p>Basically I need to get the tooltip text then replace it with something else, without disturbing the underlying HTML.</p>
  
  <p>Thanks heaps.</p>