Programmer's Guide to Regular Expressions
Concise, to-the-point tutorial on Regular Expressions with sections on more advanced aspects of the feature.

Writing Classes in Javascript
Writing classes in Javascript doesn't give full functionality of an object oriented language, but it at least gives data hiding and encapsulation which are very useful, especially when javascript is not a strongly typed language. It is very useful in cases when you need to handle multiple objects, instead of having arrays for all kinds of variables and then managing those arrays in methods you can just write a class to handle one object and then make many instances of that class. This also gives the namespace resolution to the variables so that you can avoid using global variables and still use variables across procedures.

Building a Javascript array
Here are the basics of how to make a simple javascript array for your HTML page. To get you started, first you have to call the scripting method you are going to use. In this case we will call javascripting method.

Date Functions
The document object has a last modified date property. This specifys the date the file was last modified on. This can be useful for showing when the page was last modified without having to modify any HTML when you make a change. This tutorial shows how to display the last modified date in several different formats using JavaScript.

Last Modified Display 2 (Date Only)
A code snippet to determine and display the date the document was last modified, date only.

Creating time-dependent scripts using JavaScript
Learn how to use JavaScript to manipulate and display the current time and date.

Calculating the difference between two dates
Learn how to calculate the difference between two dates in JavaScript, and in the process, derive some useful applications such as counting down to a particular event, counting up, displaying what's new on your page etc.

Cookies
A cookie is a way you can store some information about a user visiting your site. The information is stored on the individuals computer, and thus you do not need any extra server space to customize a page for any amount of users you may have. To use Cookies there are two things you need to do, one is set the cookie, and the other is retrieve a cookie you have already set. Here's a brief tutorial on how to use cookies, and a couple of ideas which you can use cookies for.

Understanding Session-only Cookies
Learn about session-only cookies in JavaScript, and how they can help your scripts retain information even after the page is reloaded or cleared.

Determining cookie support in client's browser
If your script relies on JavaScript cookies to store and persist information, it's a good idea to always make sure the user's browser has cookies enabled first. This tutorial shows you how to perform this detection.

Coping with Browser Differences
A brief note describing how to write JavaScripts to make them run on as wide a range of browsers as possible.

Offering Automatically Updating Syndicated Articles
This tutorial explains an easy method of offering an automatically updated html file to other sites. I have taken the example of an article but the same theory could be applied to other content such as tutorials, images or news.