adding help buttons to cookie manager, bug=118834, r=morse, sr=alecf, a=asa/drivers

suite/common/permissions/cookieP3P.xul

@@ -43,14 +43,17 @@
 <!DOCTYPE window SYSTEM "chrome://cookie/locale/p3p.dtd">
 
 <dialog id="privacySettings"
+        buttons="accept,cancel,help"
         class="dialog"
         title="&windowtitle.label;"
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
         orient="vertical"
         onload="init();"
         ondialogaccept="return onOK(event);"
+        ondialoghelp="return doHelpButton();"
         style="width: 45em;">
 
+  <script type="application/x-javascript" src="chrome://help/content/contextHelp.js" />
   <script type="application/x-javascript">
   <![CDATA[
 
@@ -135,6 +138,11 @@
 
   }
 
+  function doHelpButton()
+  {
+    openHelp('privacy_levels');
+  }
+
   ]]>
   </script>
 
@@ -255,5 +263,4 @@
   </groupbox>
 
   <separator class="thin"/>
-
 </dialog>