AJAX provides Web developers with plenty of opportunities to enhance the user experience and improve the performance of their websites. There are countless ways that AJAX can be used, and fortunately there are plenty of good and useful AJAX tutorials out there to help you with your own implementation.

This post serves as a collection of useful tutorials on working with AJAX in a wide variety of ways. You’ll find tutorials on working with forms, building shopping carts, creating chat features, working with log-ins and usernames and much more..

Thanks to the Web's widespread adoption of JavaScript, JavaScript libraries have sprung up to help make design and development easier. Here are a few of the major JavaScript libraries that developers use: jQuery, Prototype, Scriptaculous, mootools, Dojo. These frameworks have thriving communities whose members have developed countless plug-ins that can greatly add to the JavaScript framework.

However, sometimes we need JavaScript solutions that are a little more involved or specific. Here are 75 more handy JavaScript techniques that have made websites much sleeker and more interesting..

Here is a masked input plugin for the jQuery javascript library. It allows a user to more easily enter fixed width input where you would like them to enter the data in a certain format (dates,phone numbers, etc). It has been tested on Internet Explorer 6/7, Firefox 1.5/2, Safari, and Opera.

So you’ve built a beautiful, standards-compliant site utilizing the latest and greatest CSS techniques. You’ve mastered control of styling every element, but in the back of your mind, a little voice is nagging you about how ugly your select's are. With a little DOM scripting and some creative CSS, you can make your select's beautiful.

Do you want to show the site's favicon for all links that point to external sites? This small tutorial shows you how to accomplish it with CSS and Javascript.

File inputs <input type="file" /> are the bane of beautiful form design. No rendering engine provides the granular control over their presentation designers desire. This simple, three-part progressive enhancement provides the markup, CSS, and JavaScript to address the long-standing irritation.

For all of us who deal with long web pages and need to scroll to the top for the menu, here's a nice alternative: floating menus that move as you scroll a page. This is done using HTML, CSS and jQuery, and it's fully W3C-compliant.

This tutorial covers how to create a "floating menu" using HTML, CSS, and jQuery. To reiterate, a floating menu stays visible even if you scroll down a web page. They're animated, so they move up and down as you scroll the browser window up or down.

This animated JavaScript tooltip script is very easy to use and lightweight at only 2kb. It is tested working in IE6+, Firefox, Opera and Safari. Jacob Gube of Six Revisions has posted the script and a walk-through of the code and the logic.

For both accessibility and usability reasons, all input fields and other form controls except buttons should have an associated label that clearly states what the purpose of the control is, or what kind of input the user is expected to fill it with.

Sometimes the visual design places restrictions on those labels, in some cases to the extent that there is no room for a label. One common workaround when no label can be displayed is to put some placeholder text in the text field and let that act as the label..

The purpose of this script is to provide a unique and elegant way to visualize data using Javascript and the canvas object. This type of visualization can be used to display connections between many different objects, be them people, places, things, or otherwise.