1) You're including JS wrong: <script src="http://code.jquery.com/jquery-1.8.0.min.js" type="text/javascript"></script>

You should use wp_enqueue_scripts()

However we ask you not include other jQuery unless you have a good reason, as jQuery is included in WP.

2) Your plugin is missing a readme. Please create one based on this:
http://wordpress.org/extend/plugins/about/readme.txt

Alternately, you can use this tool to generate one:
http://tools.trepmal.com/wp-readme-generator/

A readme.txt is needed so your plugin will display correctly in our repository, but also so we can make sure you're providing the users with all the information they need before they install your plugin. Our goal with this is to make sure everyone knows what they're installing and what they need to do before they install it. No surprises :)

Could you send a link so the completed plugin can be downloaded please. Alternately you can reply to this and send a .zip or .rar file.