title: HTML input field hint
body: <p>I want to provide the user with a hint on what he needs to enter into my text field. However, when I set the value, it does not disappear once a user clicks on the text field. How can you make it disappear?</p>
  
  <pre><code>&lt;form action="input_password.htm"&gt;
    &lt;p&gt;Username:&lt;br&gt;&lt;input name="Username" value="Enter username.." type="text" size="20" maxlength="20"&gt;&lt;/p&gt;
  &lt;/form&gt;
  </code></pre>