implement api level toggling
 and rename navtree.js to android-developer-reference.js for all reference related scripts
 TODO: shading for hidden classes in the treeview navigation... these aren't dynamic yet.
diff --git a/tools/droiddoc/templates/package.cs b/tools/droiddoc/templates/package.cs
index 5ef3e0c..b29bc77 100644
--- a/tools/droiddoc/templates/package.cs
+++ b/tools/droiddoc/templates/package.cs
@@ -2,25 +2,30 @@
 <?cs include:"macros.cs" ?>
 <html>
 <?cs include:"head_tag.cs" ?>
+<body class="<?cs var:package.since ?>">
 <?cs include:"header.cs" ?>
 
 <div class="g-unit" id="doc-content">
 
+<div id="api-info-block">
+<div class="api-level">
+  <?cs call:since_tags(package) ?>
+</div>
+</div>
+
 <div id="jd-header">
   package
   <h1><?cs var:package.name ?></h1>
   <div class="jd-nav">
       <?cs if:subcount(package.shortDescr) ?>
-      Classes |
-      <a class="jd-navlink" href="package-descr.html">Description</a>
+        Classes | <a class="jd-navlink" href="package-descr.html">Description</a>
       <?cs /if ?>
   </div>
-  <span class="api-level">
-    <?cs call:since_tags(package) ?>
-  </span>
-</div>
+</div><!-- end header -->
 
-<div id="jd-content">
+<div id="naMessage"></div>
+
+<div id="jd-content" class="api apilevel-<?cs var:package.since ?>">
 
 <?cs if:subcount(package.shortDescr) ?>
   <div class="jd-descr">