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Exception handling allows you to manage run-time errors in an orderly fashion. In the 'C' program, every call to the function must be examined by the program. If else statement should surround each function call, and statements must be inserted to handle errors. The source code becomes large and difficult to read. Also some function cannot return an Errorvalue.

Showing the number of visitors online on your website is a very nice feature. For yourself, and also your visitors. In this tutorial you will create a perfect script that does the job.

Summary of DOM and how to use it

Using Cron with PHP in Cpanel

Tutorial explains how to create, destroy, edit, and manage cookies' settings.

Keep track of your visitors with powerful Ruby on Rails session features

Tutorial focusing on introductory HTML, and covers most aspects to get you started.

Tutorial showing how to use functions in JavaScript.

How to protect your Ruby code from unwanted input.