fix preview window size.

app/views/admin/ad_banners/_preview_block.html.erb

@@ -1,7 +1,7 @@
 <% if ad_banner -%>
 <%= link_to 'Preview',"#slideshow-#{ad_banner.title.dehumanize}",:class=>"btn btn-primary btn-large",:data=>{:toggle=>'modal'} %>
 
-<div class="modal hide fade in" id='slideshow-<%=ad_banner.title.dehumanize%>'>
+<div class="modal hide fade in banner-preview" id='slideshow-<%=ad_banner.title.dehumanize%>'>
   <div class="modal-header">
     <a class="close" data-dismiss="modal">×</a>
     <h3>Modal header</h3>

app/views/admin/ad_banners/index.html.erb

@@ -1,3 +1,5 @@
+<%= stylesheet_link_tag "admin/ad_banner_preview" %>
+
 <div id="post-body-content" class="clear">
 	<ul class="nav nav-tabs">
 		<% @ad_banners.each do |ab| %>