documentation more consistent

scrbl/wv-element.scrbl

@@ -10,7 +10,7 @@
                      "../racket-webview.rkt"
                      "../wv-element.rkt"))
 
-@title{wv-element}
+@title[#:tag "wv-element"]{wv-element}
 @author[@author+email["Hans Dijkema" "hans@dijkewijk.nl"]]
 
 @defmodule[racket-webview/wv-element]
@@ -22,7 +22,7 @@ represent one DOM element within a @racket[wv-window%] and provide a small
 object-oriented interface for event dispatch, content replacement, CSS class
 manipulation, style access, and attribute access.
 
-@section{Overview}
+@section[#:tag "wv-element-overview"]{Overview}
 
 A @racket[wv-element%] object is associated with:
 
@@ -37,7 +37,7 @@ of its methods therefore follow the contracts of those lower-level functions.
 The class also stores per-element event callbacks used by @racket[wv-window%]
 when dispatching JavaScript events received from the browser.
 
-@section{Class: wv-element%}
+@section[#:tag "wv-element-class-wv-element"]{Class: wv-element%}
 
 @defclass[wv-element% object% ()]{