title: How to add text to form input
body: <p>I am really not sure where to start with this. I have a form input box and submit button. When the submit button is pressed, the form content is submitted and used in some javascript. What I want to do is automatically add some text to the end of the submission.</p>
  
  <p>So if a user inputs "The dog walked" and pressed submit, the form would add "across the street." to the end of the submission.</p>
  
  <p>Thank you!!</p>