Display New Text in Panel Extension

Hello!

I am working on my first Panel Extension for Adobe Premiere Pro CC 2014. But I'm running into some problems.

Here's what I am trying to do:

• User submits a number (this is done through a HTML form)
  • i.e. <form>
  •       <input id="user_input">
  •       <input id="button" class="submit" onClick="myFunction();">
  •       </form>
• I then use JavaScript that will perform an AJAX request which will pull a JSON object from a server (I have successfully pulled this information)
• Then use JSX to display this information in the premiere panel.

Here's where I'm getting caught up:

• How in the world do I update a panel's HTML to display my new information?

I cannot figure out how to use extendscript to display new information to an HTML panel. If someone could give me a simple example of how to achieve this that would be awesome!

Thank you