clarify that pixelDepth and colorDepth are without alpha channel

Author: annevk

cssom-view/Overview.html

@@ -27,13 +27,13 @@
 
    <h1 id=cssom-view-module>CSSOM View Module</h1>
 
-   <h2 class="no-num no-toc" id=w3c-doctype>Editor's Draft 15 July 2010</h2>
+   <h2 class="no-num no-toc" id=w3c-doctype>Editor's Draft 11 August 2010</h2>
 
    <dl>
     <dt>This Version:
 
     <dd><a
-     href="http://www.w3.org/TR/2010/ED-cssom-view-20100715/">http://www.w3.org/TR/2010/ED-cssom-view-20100715/</a>
+     href="http://www.w3.org/TR/2010/ED-cssom-view-20100811/">http://www.w3.org/TR/2010/ED-cssom-view-20100811/</a>
 
     <dt>Latest Version:
 
@@ -669,16 +669,12 @@ <h3 id=the-screen-interface><span class=secno>4.2. </span>The <code
 
   <p>The <dfn id=dom-screen-colordepth><code>colorDepth</code></dfn> and <dfn
    id=dom-screen-pixeldepth><code>pixelDepth</code></dfn> attributes <em
-   class=ct>must</em> both return the number of bits allocated to colors in
-   the output device. If the output device does not support colors these
-   attributes <em class=ct>must</em> return zero.</p>
+   class=ct>must</em> both return the number of bits allocated to colors
+   (i.e. excluding the alpha channel) in the output device. If the output
+   device does not support colors these attributes <em class=ct>must</em>
+   return zero.</p>
   <!-- pixelDepth is not supported by Internet Explorer 7 -->
 
-  <p class=note>Bits allocated to handling transparency are not taken into
-   account.</p>
-  <!-- this note is there because it does not work reliably on Windows in
-       all browsers -->
-
   <h2 id=extensions-to-the-document-interface><span class=secno>5.
    </span>Extensions to the <code title="">Document</code> Interface</h2>