If you are considering building a web site for your business, then you will more than likely like it to rank in the search engines There are many factors that influence website rankings and many of these factors can be implemented while you are creating your website. Optimizing your website properly for your business will ensure a more successful site.

Have you heard the concept "Content is King"? The search engines are becoming more selective at who ranks highly and want to provide the best content for each search term. They are looking for high quality content that is continually updated and provides a quality experience for their searchers. It makes no difference whether you have a content site or a physical product site. Content is "King" as far as the search engines are concerned. By providing quality content and/or good descriptive descriptions of products you sell you will be helping your customers and you may just help yourself at ranking.

One mistake many new webmasters make is to over optimize their web page by using too many keywords. If you are excessive with your keywords, your web page will not read well and the search engines my penalize you. It is considered spamming when your techniques are questionable even if that wasn't your intention. There are other techniques that are considered unethical including hiding text, and redirects. Just write for your visitor and don't try to over optimize your web page.

Another thing to keep in mind that may cause you problems is the use of frames. Make sure you know how to use frames correctly before using them on your website. If the proper frame context is established, then the search engines can send visitors to your site. However if you use frames incorrectly the spiders for them will not be able to crawl your web page and or website.

During web site building, you should also consider the depth of your site. Search engines have spiders that crawl through the web pages and find the necessary keywords. If you do not setup the correct linking structure throughout your website the spiders may not be able to crawl your entire site. One of the best practices when setting up your websites' structure is to include a sitemap that lists all the web pages that make up your website and then link your sitemap to your homepage. This will help ensure that the search engines can crawl your site.

With proper planning and a little research you will be able to build a professional site that the search engines love.

AJAX is a cross-platform technique that can be use on different operating system and web application based on JavaScript and DOM. It is a powerful approach of web application technique using client-side scripting to exchange data with the web server. This means that with AJAX, web pages increases interactivity and faster responsiveness of user interface by having an independent communication with the server. Gone are the traditional ways of web browsing whereby a new page communicates with each user's request. This creates dynamic web application user interface that renders effective usability of every desktop applications. AJAX primary purpose is to increase the web page's interactivity, speed, functionality, and usability.

Ajax, by definition, is not technology. In fact, it is an application of several technologies. Ajax incorporates several existing web application like XHTML and CSS for standard-based presentation; the Document Object Model for dynamic display and interaction; XML and XSLT for data interchange between the server and the client; the XMLHttpRequest to exchange asynchronous data with the web server; and the use of JavaScript as the core code for running AJAX application.

To understand AJAX, first we must know how the traditional web application works. The classic web interface trigger an HTTP request back to web server. The server then process and retrieve data before returning an HTML page to the users. This process as a model for hypertext medium makes technical sense. But as web application evolves this process does not make the user interface more interactive and practical.

AJAX, on the other hand, eliminates this problem. AJAX speed up the loading of any web application with the use of intermediary between the user and the server called AJAX engine. This adding of another layer application of eliminates the start-stop-start-stop nature on the web. The browser loads an AJAX engine at the start of session.

The AJAX engine allows the user interface and the application to interchange data asynchronously-independent of the communication to the server. So the interaction between the user and the web never slows down, no point of waiting for the server to do something.

AJAX is a powerful technique that grows exceedingly as web application. That is, AJAX is now part of the guiding principle as web 2.0 flourishes and become a practical reality. With the power of AJAX, many of the business and marketing web site are integrated with AJAX application server platform now. Most of the major products of Google such as Gmail, Google Maps, and Google Suggest are employing AJAX application. Other web services like the photo-sharing application Flickr, Amazon's A9.com, and the new Yahoo! maps depends on AJAX. The application of AJAX comes from simple function to the most complex program like Google Maps.

Functions are used to perform a well defined task that is normally repeated at various places within a web site, web application, or other software application. The function sometimes needs certain information before performing its task, and sometimes returns a value to the calling page or program.

An example of how to use a simple function in PHP:

 function showMessage() {
echo "{$_SESSION["message"]}"; }

The above example shows a very simple function that displays the contents of a session variable called 'message'. The idea being that while a user is using a web site, etc, various messages are generated and stored in the 'message' session variable. Whenever the showMessage function is called, the contents of the session variable are displayed. So, for example, when the user logs on, you could display a message saying that they have done so. Likewise, when they log off, a different message could be displayed.

Calling a function

To call the showMessage function, you would just need to include the line:

showMessage()

in the web page (wrapped in php tags to distinguish it from normall HTML).

Passing values to a function

Often, a function requires one or more input values in order to perform its task. For example, take the following example that takes two numbers as input, and adds them together. The result is then returned to the calling web page or program.

function addNumbers($number1,$number2) {
$answer = $number1 + $number2;
return $answer; }

In the calling program we would have something similar to the following:

$number1 = "5";
$number2 = "6";
$sumOfNumbers = addNumbers($number1,$number2);
echo "$sumOfNumbers";

Obviously, in a real program you would not have the numbers hardcoded like this, but they would be obtained from user input or by some other means. Notice also that although the name of the returned variable is $answer, the calling program makes no reference to that. We could, if we wanted to, change the calling program to:

$answer = addNumbers($number1,$number2);
echo "$answer";

which might make things slightly easier to understand.