title: Change paragraph after selecting value in dropbox in js
body: <p>I have a form with dropbox with a few options.
  I want to change a paragraph according to the selected value in the dropbox, i.e. the selected value will replace the paragraph.
  For ex. I have:</p>
  
  <pre><code>&lt;select name="howmanyno1" size=1&gt;
  &lt;option value=2 selected&gt;2&lt;/option&gt;
  &lt;option value=3&gt;3&lt;/option&gt;
  &lt;option value=4&gt;4&lt;/option&gt;
  &lt;option value=5&gt;5&lt;/option&gt;
  &lt;/select&gt;
  //somewhere below
  &lt;p&gt;number&lt;/p&gt;`
  </code></pre>
  
  <p>I need the text "number" be replaced after selecting a value from the dropbox, with the value selected (2,3,4 or 5).
  How should I do this?
  Thanks.</p>