JavaScript and AJAX Web Development Tutorials

JavaScript, jQuery and AJAX (Asynchronous JavaScript and XML) Tutorials.
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Introduction One Javascript function that gets used such frequently than it should to be is "eval". "eval" evaluates the content of a text string passed to it and then executes it as if it were normal Javascript code.. Actually, we should never use eval for any purpose in our code, be it...
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I needed to trim a string and also replace more than one spaces with a single space. The solution was simple with String.replace in JavaScript. Here's the code: var m = " My name is Pradeep "; m = m.replace(/^+/,'').replace(/+$/,'').replace(/{2,}/,' '); Making a function out of it. ...
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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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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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Introduction A random number generator (often abbreviated as RNG) is a computational or physical device designed to generate a sequence of numbers or symbols that lack any pattern, i.e. appear random. Computer-based systems for random number generation are widely used, but often fall short of...
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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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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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Have you ever wondered when you see form on some website submitted in a fraction of a second? Have you ever wanted such forms on your site? This is it. Let us take a sample form. <form method="post" action="SubmitToSomeFile" id="frm" accept-charset=UTF-8 name="frm"> <table...
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Feedburner statistics are not part of Google Analytics and I couldn't understand why but you can track Feedburner Email Subscription Form Submission in Google Analytics Very easily. Activate Email Subscription for your Feed in Feedburner and grab the HTML code of your subscription form. The HTML...
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On many forums like DigitalPoint you would see lots of people claiming to be making thousands of $$$ with an ebook that costs $1 and have lots of screenshots to show you as well. Never trust those. This can be done in Firefox and IE7 with just one line of code. Yes its true. One line exactly. ...
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Sometimes, we need to rotate images on ours web pages, it may be ads or some simple images.Below you'll find the code for implementing the same. You can create as many image rotations you want, you just need to specify the urls of the images in an Array, and the object where the image will be...
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Introduction Regular expressions is a form of pattern matching that you can apply on textual content. Take for example the DOS wildcards ? and * which you can use when you're searching for a file. Creating a Regular Expression You construct a regular expression in one of two ways: 1)...
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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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Well all would have at some point of time needed to make a timer in JavaScript. I have made a timer in Javascript. The script shows the timer in the status bar,you can modify it to display the timer anywhere you want. Check out the code below: var mins,secs,TimerRunning,TimerID; ...
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Sometimes we need a sorted UL (un-ordered list) in a static page, like a blog, we can use JavaScript to the sort the list. I faced a similar problem with my blog, so I implement a simple bubble sort on the list, the list will be sorted if the browser supports JavaScript, else it will still...
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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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Non-JavaScript Programmers find it difficult to have fancy drop down menu's but not any more. Today I will show you how easy it is to create a simple yet very SEO Friendly Drop Down Menu Using JQuery. The idea of this article came from the thread started by siddharthrkulkarni on Drop Down Menu....
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JavaScript is widely used for client side scripting ranging from simple effects to creating a rich UI like GMail. A significant operation with the client browser involves working with the browser window, like scrolling, resizing popup window, detecting window resize by the user, opening new...
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There are multiple ways to attach an event handler in jQuery but all of them does not function exactly the same way. If there are elements created after DOM is loaded, then not all the events associated with them would be triggered if you have not attached the event handlers correctly. Example ...
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Desktop notifications for web applications is a great plus, the user can be notified irrespective of the current window/tab they are using. Chrome, which has the largest share of the browser market, supports desktop notification, also Safari, or any webkit based browser. You can easily...
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