Class password

 widget --+                
          |                
xist_widget --+            
              |            
         _input --+        
                  |        
               text --+    
                      |    
                  utext --+
                          |
                         password

The password widgets consits of two <input type=password> elements
that are wrapped in <div class=password-input-container>s so you
can position them. So the resulting HTML looks like

<div>
  <div class=password-input-container>
    <input name=password_name0>
  </div>  
  <div class=password-input-container>
    <input name=password_name1>
  </div>
</div>

The two entries must match, naturally, and will always be ignored
if both are empty.