implemented javascripts for approval/disapproval/unapproval from post/show page

app/views/unapprovals/create.js.erb

@@ -0,0 +1,9 @@
+var errors = <%= @unapproval.errors.full_messages.to_json.html_safe %>;
+if (errors.length > 0) {
+  Danbooru.Utility.j_error(errors.join("; "));
+} else {
+  Danbooru.Utility.j_alert("Unapproval", "Unapproval successful");
+  $("a#approve").show();
+  $("a#disapprove").show();
+  $("a#unapprove").hide();
+}

app/views/unapprovals/new.html.erb

@@ -1,4 +1,5 @@
 <p>You can unapprove a post if you believe it breaks the rules or doesn't belong on this site. You must provide a reason.</p>
-<%= form_for(@unapproval) do |f| %>
+<%= form_for(@unapproval, :remote => true, :format => :js) do |f| %>
+  <%= hidden_field_tag "unapproval[post_id]", @unapproval.post_id %>
   <%= f.text_area :reason, :size => "40x5" %>
 <% end %>