Show a message if no posts exist with the given tags.

index.html

@@ -118,6 +118,7 @@ title: Home
                 {% for post in site.posts %}
                     <li data-tags="{{ post.tags | join: "|" }}">{{ post.date | date: "%b %-d, %Y" }}: <a class="underlined" href="{{ post.url }}">{{ post.title }}</a><br /><span class="subtitle">{{ post.description }}<br />{{ post.tags | join: ", " }} &middot; <a href="{{ post.url }}#disqus_thread" data-disqus-identifier="{{ post.id }}"></a></span></li>
                 {% endfor %}
+                <li id="null-post" data-tags="" style="display: none;"><i>No posts with these tags</i></li>
             </ul>
         </td>
     </tr>

static/main.js

@@ -11,6 +11,7 @@ function load_tag_filters() {
             filter.push($(this).data("tag"))
         });
         $("#post-list li").show();
+        $("#null-post").hide();
         if ($(".tag-selected").length == 0)
             return;
         $("#post-list li").each(function() {
@@ -22,6 +23,8 @@ function load_tag_filters() {
                 }
             }
         });
+        if ($("#post-list li:not(:hidden)").length == 0)
+            $("#null-post").show();
     }
 
     if (window.location.hash) {