Blackbam

<p>This plugin provides an easy, lightweight possibility to add header images to your blog. It is simple and clean.<br />
It is easy to understand, maintain and extend. It does not make use of extra tables or buggy built-in uploads.</p>
<p>Features:</p>
<ul>
<li>Simple and easy management of header images</li>
<li>Each possible state is covered, by using all elements of the <a href="http://upload.wikimedia.org/wikipedia/commons/3/3d/Wordpress_Template_Hierarchy.png" rel="nofollow ugc">WordPress template hierarchy</a></li>
<li>The Media Library is used for image management, images are saved by URL copy/paste (so external images can be used, too)</li>
<li>Requires no extra tables</li>
<li>Support for Custom Post Types (Single Custom Post Images) and Custom Taxonomies (Taxonomy Page Images)</li>
<li>NEW (1.1.0): Linked Header Images (e.g. category page, larger image version, whatever you want …)</li>
<li>NEW (1.1.0): Display Category Image by default</li>
<li>NEW (1.1.0): Full output customization</li>
<li>NEW (1.1.0): Exclude specified Taxonomies / Post Types from Header Image functionality</li>
<li>NEW (1.1.0): Internationalization (incl. English / German translation)</li>
<li>NEW (1.2.0): Added API to retrieve plain URL/Link and output</li>
<li>NEW (1.2.0): Added possibility to use relative URLs.</li>
<li>NEW (1.2.0): Added Custom Header Images for author pages.</li>
<li>Clean install/uninstall</li>
</ul>
<p>Languages:<br />
en_US (default)<br />
de_DE: German<br />
sr_RS: Serbian (translation by webhostinghub.com)</p>
<p>Please report any bugs you may encounter.</p>
<p>Plugin URL: <a href="http://www.blackbam.at/blackbams-blog/2012/06/25/custom-header-images-plugin-for-wordpress" rel="nofollow ugc">http://www.blackbam.at/blackbams-blog/2012/06/25/custom-header-images-plugin-for-wordpress</a></p>


Custom Header Images

A very simple and lightweight Plugin for managing custom header images for pages, posts, archive-pages, and all other possible.

Anand Kumar

Digital Liberation

<p>If you are running a WordPress site then sooner or later you need to insert some kind of code to your website. It is most likley a web analytics code like Google Analytics or may be social media script or some CSS stylesheet or may be Custom fonts. This plugin will do all the magic. Even if you want to insert those codes in a custom post type.</p>
<p>All you have to do is adding appropriate html code.</p>
<p>Don’t forget to wrap your code with proper tags.</p>
<pre><code><script type="text/javascript">
YOUR JS CODE HERE
</script>
</code></pre>
<p>Or for CSS:</p>
<pre><code><style type="text/css">
YOUR CSS CODE HERE
</style>
</code></pre>
<h4>Why use this plugin:</h4>
<ul>
<li>To insert CSS and JavaScript codes to <code><head></code> or before <code></body></code>.</li>
<li>To insert code to <code><head></code> of any single page or post.</li>
<li>To insert code to Custom Post Type [New Feature].</li>
</ul>
<p>The plugin should be compatible with WooCommerce.</p>
<h4>What it does not offer</h4>
<ul>
<li>You can’t insert/execute PHP codes.</li>
</ul>
<p>Almost all WordPress theme do support this “Header and Footer Scripts” plugin. If the codes are not appearing in your site [ask for support] or look at your theme file if they have standard <code>wp_head</code> and <code>wp_footer</code> hooks.</p>
<h4>Important Links</h4>
<p>For furhter information you are welcomed to follow these links:</p>
<ul>
<li><strong><a href="https://github.com/anandkumar/header-and-footer-scripts/wiki" rel="nofollow ugc">Read Documentation</a></strong></li>
<li><strong><a href="https://wordpress.org/support/plugin/header-and-footer-scripts/" rel="ugc">Get Support</a></strong></li>
<li><strong><a href="https://github.com/anandkumar/header-and-footer-scripts" rel="nofollow ugc">GitHub Repository</a></strong></li>
</ul>


Header and Footer Scripts

good

Como es posible que al desinstalar el plugin, si no has borrado el script te deje el código ahi metido. Y luego a averiguar de donde vienen los errores. 

Al desinstalar te deja el código

Header and Footer Scripts plugin allows you to add scripts to WordPress site's  and just before closing  tag.

Custom Header Images vs Header and Footer Scripts