In a website, the availability of a facility to download the articles and news is often used by visitors to gain a more complete information. Sometimes the facility is set based on the user (public or registered). If users register as members can then download the information more complete. This is common to distinguish between the user and user-specific.

Feature download manager can be installed  to the system in Joomla! easily, but has full features such as: statistics on the number of articles downloaded, the downloaded new articles, most downloaded articles, and other statistics.
System in Joomla! version 1.5.x, Document Manager and Statistic called Extensions. While in the veri Joomla 1.0.x and is called the Component Module.

In general, the number of Extension (the extension) is very much divided into several types, namely: Component, Language, Module, Plugins (mambots), Special, and Templates. Of several types can be divided into several categories. For more details, the following list is taken from the Extension website  Joomla (http://www.joomla.org).

1.  COMPONENT

In general, the Component  function to add the functionality of the system Joomla have a page to set some parameters. For example, facilities Document Manager (DOCMAN) have settings to make the article category, description, image, copyright, the link address, and others.

Number of Components is currently developing more than a hundred and will continue to grow in line with the development of the age and needs of users. Component to install, it first must download the official Joomla website. Components that have free and paid, but not to worry because the amount of free Components more of the paying. Both have the same features of a complete and reliable as tested and will continue to be “monitored” by the Joomla community, discussion forums and comments from users to improve the system so that better.

Some Important Components
The many extensions developed by third parties (3rd development) is one of the factors Joomla is growing rapidly and demand, many users, especially for beginner web developers who have limited knowledge of web programming languages.

This is because Joomla is designed to be integrated with some additional features that are developed by third parties include component, module, plugins, and templates. Essentially, Joomla is designed to build the web the most simple to the complex web portal with some additional extensions easily.
Thus, the form of a website generated depends on the initial design of making the website itself and live enter some extension is necessary. It is recommended to study the function of some component that is provided.

Here are some examples of the component according to the author it is important to know and have been used in various purposes according to theme a website built.

1. Community Builder (com_comprofiler.zip): useful to build a community website such as: professional organizations, religious, medical, and other communities. Please note, this requires a component module for the system work better.

2. Fireboard (FireBoard_1.0.4_Stable_CompletePackage.zip): useful to create a forum for discussion and can be integrated with Community Builder so that information can be complementary to one another.

3. PHP Free Chat (com_pfchat15_1.0.1.zip): work to provide the facility to chat online without requiring a server such as Yahoo Messenger, MSN Messenger, and mIRC.

4. Jevent (com_events_1.4.3rc2.zip): function to display the events (Event Calendar), for example, the training schedule, teaching schedule, schedule meetings, and others. This module requires a component that appears in the main page.

5. VirtueMart (com_virtuemart_1.0.15.zip): work to create a website online store. This component also need some module to menampillkan products. Usually when download this extension, all supporting files are included.

2.   MODULE

Module is a mini application that are placed on the left, right, up and down the main page a website. Function module to display some of the component has been installed. So, when installing a component then automatically install the module. One is multi-component, when you first installed it will automatically install the module to display the language selection in the main halama website.

Module has a very important role to display the beauty of the website because it can control the interface and the component is installed. Module can also display a website with an innovative way and show images in random articles, the video documents, audio and animation and other documents so that they do not have the impression monoton.
Similarly, with the component, the module will be installed in the website to be downloaded first. And specialty module files have the prefix “mod” in front of the file name, for example mod_cd_login_1.0.9.zip.

Unlike the component, module does not have a page to set the parameters such as the specific component. Module can only be me-disable and enable on the left, right, up or down on the main website page.

Some Important Module
Business on the Internet has not been much done by some of the Word people, this is not due to the prevalence of information technology to remote areas (rural). In the urban area itself is also not utilize the Internet as the “land business” that arouse. While many benefits are gained by utilizing the Internet, such as: business online stores, online training, online consultancy, web design, to hosting and domain sales.

Before the emergence of software such as Joomla!, Web developers take a minimum of three months to design a web. Not to mention the test and repair systems. Need a very long process, especially the consumers often change the look, and navigation features, that extra work will add a morning programmer.
Now with the Joomla!, The feel of the webmaster. At least for a beginner webmasters who want to build a website quickly, although a knowledge of programming languages is limited.

A large number of modules developed by the parties have an important role, especially in terms of look and innovation. However, not all modules are developed for free, there is also a must buy alias paid. Although most of the module is free, does not mean the feature does not have a full or less secure.
Here are some modules that are important to know and used in accordance with the theme that will be made. Some of the module has been used by the author when building the website in a variety of needs.

1. Caraousel Banner (mod_carousel_banner.zip): function to display ads (banners) at random and innovative. Ads that are displayed will automatically move according to the number of alternate and image ads. And each image ad has a URL address (link) is different.

2. Media Player (mod_mediaplayerJ15v-1-0en.zip): function to display and run (play) audio online. This module is often used if you want to build a website theme music.

3. Trans Menu (mod_TransMenu_v1.3.zip): working to create interactive menu that has submenu (pull down). This module can be used to change the display more informative website navigation with the simple but powerful.

4. Random Article (mod_randomartikel.zip): function to display articles randomly. This module is often used to create a portal website containing information or news. Articles will appear in random order according to the number of articles. All articles can be specified in the parameter this module.

5. Birthday (mod_CbBirthday1.1.zip): functioning system for members of the reminder date of birth (birthday). This module is usually used on a website community that is integrated with the Community Builder component and the Forum.

6. Sliding Menu (Camp26_KwickSliding_menu_J15.zip): function to display the menu Sliding. This module is used to simplify the menu view that many in number. With this module the list of menu items will not appear before the menu is.

3.  PLUGINS/MAMBOTS

Understanding Plugins/Mambots
By default, the system Joomla 1.5.x version has 6 categories namely plugins, as:

1. Authentication: related to the authentication system that is integrated with Joomla, eg Gmail authentication.
2. Contents: related to manipulating articles or contents.
3. Editors : related to the manipulation of the editor used to write the contents or articles.
4. Editor-xtd : related to the manipulation of the features editor is more complex.
5. Search : related to the manipulation of the function search / search on the website.
6. System: related to the system such as Joomla Legacy 1 for some component or module that works on the previous version.

Some plugins / mambots standard “default” that is Joomla, as:

1. Image : mambot that works to convert the (mosimage) in the content to insert into the picture in the HTML (img tag).
2. Pagebreak :mambot that works for navigation pages (cut a long page into several pages with the complete table of contents.
3. Moscode : mambot that works for menggati the moscode) ((/) moscode a command tag that marks the programming code.

Some Plugins / mambots Important
The number of plugins / mambot that is not developed as much as component, module, and template. There is no clear reason alasana that they do not develop many plugins / mambots, possibly because the range is too wide and not more difficult in the development.
The author in using the plugin / mambots, there are some plugins that are important especially to secure the site (site security). Here are some example plugins / mambots, as:

1. Antiflood (floodcontrol.systembot.v.1.2.zip): work to secure the site from flooding (the server is busy working to create, for example, to repeatedly Refresh)).
2. Content Protector (mbt_contentprotector.zip): work to protect an article (content) for the visitors. This plugin is used to separate biasaya between visitors with members (Registered).
3. All Videos (plg_jw_allvideos-v2.5.3_j1.5.zip): functions to run in the form of a video file with the types: Flash, QuickTime, Shockware, Windows Media, and Real Media..
4. Jsecure Authentication (plgSystemJSecure-1.0.6.zip): work to protect the administrator page of hacker attacks. There are some developers website page is not an administrator, so it’s easy to dihacker people. This plugin is very useful to hide the administrator folder.

4.  TEMPLATE

Display a website influence the emotions in the visitor to enjoy the information presented. No wonder if a web-only ads will soon be left behind by visitors. The placement of the navigation neat, a cool color, the news is informative and simple grammar that will invite all users of the Internet to visit website. Therefore, the template has an important role to play in a news website in addition to informative.

Understanding Templates
Each template will display the website different. This is because each template has a parameter that is different from the letter (font) used, letter color, hyerlink color, background color (background), the table frame thickness, to the position of the module. Setting text color, hyperlink, type the letter for bodytext, heading 1, heading 2, and footer is controlled by a general CSS (Cascading Style Sheet). Knowledge of CSS will be discussed in another chapter in this book. Meanwhile, to set the header image sometimes, can be edited directly in the index.php file in the folder name in the template.

In the latest version of Joomla, generally can not install a template on the previous version digunaka although already mengktifkan plugin Legacy 1, in which the plugin works for some melegalkan extension (component, module, mambots, and templates) in the version below. Some websites have provided a template that can be downloaded free of charge, but there is also a paid template. Of course, the template that has paid benefits than free. Price is also a template varied between $ 45 – $ 200, this is because a template is included in the extension (component, module, and plugin). So look website more informative and innovative.