This plugin will integrate AJAX commenting feature into your WordPress Blog. It uses the powerful JavaScript Framework jQuery to handle AJAX requests and jQuery Validation plugin by bassitance.de to validate comment form on the client side.
<h4>Feature Summary</h4>
<ul>
<li>Enable AJAX Commenting</li>
<li>Client Side Form Validation</li>
<li>Easily rolls back if JS disabled</li>
<li>Easily configure custom styles for messages</li>
</ul>
<a href="http://webdeveloperplus.com/wordpress/new-wordpress-plugin-wdp-ajax-comments/" rel="nofollow ugc">See plugin page for more details</a>

WDP AJAX Comments

This plugin will enable AJAX comment posting on your WordPress blog.

Rohit Kumar Chowdhary

The Jin Menu adds onclick event in wordpress custom link menu item , so that you can use your javascript/jQuery code from wordpress menu.
<ul>
<li>
Goto: Appearance > Menus
</li>
<li>
Select Menu
</li>
<li>
Add Menu Item of type Custom Links. Add Link Text , Leave URL Blank or Use #
</li>
<li>
Assign display location from menu settings
</li>
<li>
Save your menu
</li>
<li>
Goto: Appearance > Jin Menus
</li>
<li>
Select Your Menu on top
</li>
<li>
Select Menu Item
</li>
<li>
Add your javascript code in Javascript box
</li>
</ul>
<h4>Features</h4>
<ul>
<li>
Add Onclick In WordPress Custom Menu.
</li>
<li>
It uses its own menu to override the behaviour so there should be no conflict with other themes or plugins
</li>
</ul>
<blockquote>
Support & Bug Reports
For support and further information about the JinMenu plugin see the plugins homepage at <a href="http://buffernow.com/jinmenu-faq/" rel="nofollow ugc">Buffer Now</a>.
<a href="http://demo.buffernow.com/" rel="nofollow ugc">Working Demo</a>
</blockquote>

JinMenu

The Jin Menu adds onclick event in wordpress custom link menu item, so that you can use your javascript/jQuery codes from wordpress menu.

WDP AJAX Comments vs JinMenu