title: Python Mechanize change unnamed input value (known id)
body: <p>as is written in topic i have to change value of some input field using mechanize but i dont have name of it only id :/ Let's stick to the point.</p>
  
  <p>This is how form looks:</p>
  
  <pre><code>&lt;form id="Login" name="Login"&gt;
  
      &lt;div id="login-inputs-div"&gt;
          &lt;input id="Username" type="hidden" name="username"&gt;&lt;/input&gt;
          &lt;input id="Password" type="hidden" name="password"&gt;&lt;/input&gt;
          &lt;input id="PopupUsername" class="input-text input-text-gray" type="text" disabled="disabled" value="admin" maxlength="32" style="width:100px;"&gt;&lt;/input&gt;
          &lt;input id="PopupPassword" class="input-text input-text-gray " type="password" maxlength="32" value="" style="width:100px;" placeholder="hasło"&gt;&lt;/input&gt;
          &lt;input id="bt_authenticate" class="input-btn input-btn-orange translation Translations.general.btn.authenticate translated" type="submit" value="zaloguj"&gt;&lt;/input&gt;
      &lt;/div&gt;
      &lt;div id="logout-link-div" style="display: none;"&gt;&lt;/div&gt;
  
  &lt;/form&gt;
  </code></pre>
  
  <p>What i have to do? Fill PopupPassword using some value and later submit it?</p>
  
  <p>My approach looks like:</p>
  
  <pre><code>import mechanize
  
  url = "http://192.168.1.1"
  br = mechanize.Browser()
  br.set_handle_robots(False)
  br.open(url)
  
  br.select_form(name="Login")
  br.form().find_control(id="PopupPassword").__setattr__("value", "something")
  res = br.submit()
  content = res.read()
  </code></pre>
  
  <p>Im looking forward for some solution, thanks in advance.</p>