Here , i will tell you how to add a fade over /fade in effect to image button in jquery.

its very simple

1 . import jquery

<script type='text/javascript' src='http://yoursite.com/jquery.js'></script>

2 . add a div tag with image in it
  <div class="fadeDiv">

    <img src="1jpg" alt="" />
    <img src="2.jpg" alt="" />
  </div>

3 . add script jquery on load
<script>
$(document).ready(function(){
 
$("img").hover(
function() {
$(this).animate({"opacity": "0"}, "slow");
},
function() {
$(this).animate({"opacity": "1"}, "slow");
});
 
});

That's it . you can now see the fade in and fade out effect on mouse over the button

you can change the js to add more functionalites.

document.all() -  is a non-standard way of accessing DOM elements. It was introduced in Internet Explorer 4, because the W3C DOM hadn’t yet standardised a way of grabbing references to elements using their ID. By the time IE 5 came out, document.getElementById() had been standardised and as a result, IE 5 included support for it.
document.getElementById() -  is a standard and fully supported. Each element have a unique id on the document. It is supported by every Javascript supporting browser released since 1998.

Or you can use:

For the system we need to install three main applications on Ubuntu. And for the configuration you need to install some lib packages also.
1. Apache
2. Subversion
3. Trac
4. Python

Install SVN

sudo apt-get install apache2
sudo apt-get install subversion
sudo apt-get install libapache2-svn

Configuration

1. Create Server Folder(s)

sudo mkdir /server
sudo mkdir /server/svn
sudo mkdir /server/trac

I think you are already well aware of the SVN and Trac System. If no, don’t worry about the that here I am gonna teach you how to install and configure the SVN and Trac on Ubuntu.(For the coming version of this articles you can find the installation on windows.) Project Management for software development with SVN Trac combination will give you very good advantage on over all performance of the development. Easy for Documentation, Roadmaps, Error Reporting, Revision control and Releases. Before getting into the installation you just need to know what is SVN, Trac, and the Server URL Structure, Server File System Structure.