
Javascript / AJAX
Javascript is a scripting language developed by netscape to enable web authors to design interactive siets.
Ajax (Asynchronous JavaScript and XML) is a way of programming for the Web that gets rid of the hourglass. Data, content, and design are merged together into a seamless whole.

PHP 5
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
PHP can be deployed on most web servers and as a standalone interpreter, on almost every operating system and platform free of charge and PHP is released under the PHP licence.PHP's support for Apache and MySQL further increases its popularity.
SQL
MySQL is a database system used on the web. Basically, a MySQL database allows you to create a relational database structure on a web-server somewhere in order to store data or automate procedures.
MySQL is what holds all of your tables, PHP acts as your queries (among other things), and your forms are basically web pages with fields in them. MySQL is also open source in that it's free and falls under the GNU General Public License (GPL)
Layout Designing
Tableless web design (or tableless web layout) is a web design philosophy eschewing the use of HTML tables for page layout control purposes.[1] Instead of HTML tables, style sheet languages such as Cascading Style Sheets (CSS) are used to arrange elements and text on a web page.
Layout instructions are transferred into site-wide CSS stylesheets, which can be downloaded once and cached for reuse while each visitor navigates the site.
xHTML / CSS3
XHTML (eXtensible HyperText Markup Language) is a family of XML mark up languages that mirror or extend versions of the widely-used Hypertext mark up language in which web pages are written.
CSS was first developed in 1997, as a way for Web developers to define the look and feel of their Web pages. It was intended to allow developers to separate content from design so that HTML could perform more of the function that it was originally based on - the markup of content, without worry about the design and layout.
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