title: Set default value of a password input so it can be read
body: <p>I want to have a password field which says "Password" in it before a user enters their password (so they know what the field is)</p>
  
  <p>I'd rather just use Javascript, importing jQuery for this alone seems wasteful, but I have no idea how to. The images explain quite clearly:</p>
  
  <p><em>What it looks like:</em></p>
  
  <p><img src="https://i.stack.imgur.com/E8mnp.gif" alt="enter image description here"></p>
  
  <p><em>What I want it to look like:</em></p>
  
  <p><img src="https://i.stack.imgur.com/LnY61.gif" alt="enter image description here"></p>
  
  <p>It's only a very simple website and the most basic of logins (has no validation etc)</p>
  
  <p>Any ideas?</p>
  
  <pre><code>&lt;input id="username" name="username" class="input_text" type="text" value="Username"  /&gt;
  &lt;input id="password" name="password" class="input_text" type="password" value="Password" /&gt;                 
  </code></pre>