JavaScript and AJAX Web Development Tutorials

JavaScript, jQuery and AJAX (Asynchronous JavaScript and XML) Tutorials.
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It is highly recommended that you are familiar with HTML and Javascript before reading tutorial. Notice that this article is only glimpse on this topic, it barely covers all the AJAX features and stuff. This tutorial will show you how 'Ajax' works and how to use it from a web developer's...
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Get The Most Out of AJAX AJAX is a disruptive technology that's changed the way Web apps are developed and used. It allows for interactive pages and sits on the cutting edge of current Web trends. Although the term AJAX is relatively new, the technologies behind it are not. For many years the...
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jQuery is a client-side JavaScript library, the goal of the library is to simply the process of writing cross-browser JavaScript code. jQuery was created by John Resig and it was released to the public in 2006, jQuery is free, open-source and is dual-licensed under the MIT license & GNU GPL Version...
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Introduction Ajax, or AJAX, is a web development technique used for creating interactive web applications. The intent is to make web pages feel more responsive by exchanging small amounts of data with the server behind the scenes, so that the entire web page does not have to be reloaded each...
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Sometimes we need the user to enter only numbers in a text field, so I have some up with a small piece of JavaScript to do exactly that. It works for both IE and Firefox. function onlyNumbers(evt) { var e = event || evt; // for trans-browser compatibility var charCode = e.which ||...
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Arrays are one way of keeping a program more organized. They allow you to do some things that are difficult without them. Arrays are usually a group of the same variable type that use an index number to distinguish them from each other. Suppose you wanted to write out 5 names, and use variables for...
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A look at how AJAX works This tutorial will show you how ajax works and how to use it from a web developers standpoint. Ever wonder how things like G-Talk work? they don't reload the page or use Iframes and yet they always appear to have the data thats coming in instantly. it acomplishes this...
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The Javascript Code : function autoCompleteDB() { this.aNames=new Array(); } autoCompleteDB.prototype.assignArray=function(aList) { this.aNames=aList;
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Today, we'll see how to implement a bouncing ball in javascript. The ball will bounce all around the page and we will also introduce a gravity factor to make the ball slowly come to rest. The technique is what is important here. It can then be used in any kind of moving-object animation. What...
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The first of its kind Web Technology Conference on Open Source Technology, WebOSS '07 was organised in Kolkata on Sat, 13th Oct 07 and I spoke at the event as one of the participants on "Building Applications using AJAX". Here I will share my presentation, the PDF copy download requires you to...
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JavaScript, the most popular & most used client-side scripting language on the internet is really powerful in creating rich user experience by itself. One of the best example of JavaScript excellence is the jQuery library which has helped developers all over the world to build the business...
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Let us make a form based clock that displays time in the 24 hour format. We use the Date() object to get the hours, minutes, seconds of the day. setTimeoiut() evaluates an expression or calls a function after a certain amount of time, specified in milliseconds. We use setTimeout() to call the...
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There are hundreds of DHTML trees available online, most of them and written from scratch, some easy to understand and implement, while others are real pain to customize. Some of them need a JavaScript array to be populated or read an XML file to generate the tree. I've tried to develop one...
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The include element The element is used to refer to an external schema located in a definite address. The syntax for using the element is as shown below: <include id="ID" schemaLocation="filename" /> The element contains two attributes as id and schemaLocation. The id specifies the...
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Introduction The Date class in JavaScript.This class not only makes the manipulation of dates easier (regardless of which date format you prefer) but it also handles time as well. Any time that you have a javascript that is required to do any sort of processing based on either the...
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Programming errors are a fact of life, but pulling your hair out while tracking down these errors should not be. More robust development languages such as Java and the .NET family of languages have development environments that simplify the process of tracking down problems. JavaScript developers...
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Background Many time we found the file worm.vbs in our computer in each dir. worm.vbs may or may not be malicious. but when they execute's they consume CPU. So, Better option is to remove them. but it is tough job as they exist in each dir. I written a vbScript to...
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Many times we need to write certain parts of our script according to the browser, i.e. we need to detect the browser. Here's a snippet of how to do it. var userAgent = navigator.userAgent.toLowerCase(); var is_opera = (userAgent.indexOf('opera') != -1); var is_saf =...
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Essentially, writing some code to determine the number of days in a given month of a given year with javascript is not the worlds most difficult task. It is the type of exercise that one would expect to be given as a newbie developer during a lab or lecture. The solution normally involves...
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Sometimes, we do not want people to copy the text on some of our web pages, here is a script which prevents user (not advanced users) from selecting the text. For better results put the JavaScript code inline and not in a separate JS file. // specify allowed tags for some browsers var...
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