title: CSS border resizing itself
body: <p>I am new to CSS and I am having a problem with a border.  I have a header with a border below it.  I also have some text that is later added in with javascript.</p>
  
  <p>The problem is, when the javascript text appears, it extends past the end of the header.  This causes the border to extend as well.  </p>
  
  <p>Is there anything I can do to prevent this?</p>