title: javascript input focus
body: <pre><code>&lt;form id="commentform" method="post" action="wp-comments-post.php"&gt;
      &lt;input type="text" aria-required="true" tabindex="1" size="22" value="" 
         id="author" name="author"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>I set default value "visitor" to the input box. When focus is in text box or mouose enters it, I want to hide "visitor" string and want to show it when it loses focus or mose moves out.</p>