Ajax Blog

Learn HTML DOM for Ajax

2011-12-07T07:17:33Z

The HTML DOM defines a standard way for accessing and manipulating HTML documents.The DOM presents an HTML document as a tree-structure.DOM stands for Document Object Model.Before learning HTML DOM we should have a knowledge of Html,CSS and JavaScript.The DOM is a W3C (World Wide Web Consortium) standard.The DOM defines a standard for accessing documents like HTML and XML:”The W3C Document Object Model (DOM) is a platform and language-neutral interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document.The DOM is separated into 3 different parts / levels:
Core DOM – standard model for any structured document.
XML DOM – standard model for XML documents.
HTML DOM – standard model for HTML documents.
The XML DOM defines the objects and properties of all XML elements, and the methods (interface) to access them.The HTML DOM is:A standard object model for HTML.A standard programming interface for HTML.Platform- and language-independent.A W3C standard.The HTML DOM defines the objects and properties of all HTML elements, and the methods to access them.In other words: The HTML DOM is a standard for how to get, change, add, or delete HTML elements.In the DOM, everything in an HTML document is a node.The DOM says:The entire document is a document node.Every HTML element is an element node.The text in the HTML elements are text nodes.Every HTML attribute is an attribute node.Comments are comment nodes.A common error in DOM processing is to expect an element node to contain text.However, in the HTML DOM the value of the text node can be accessed by the innerHTML property.The HTML DOM views an HTML document as a node-tree.
All the nodes in the tree have relationships to each other.The HTML DOM views an HTML document as a tree-structure. The tree structure is called a node-tree.The nodes in the node tree have a hierarchical relationship to each other.This was an overview of HTML DOM.

Learn DHTML for Ajax

2011-12-07T07:10:17Z

DHTML stands for Dynamic HTML.DHTML is NOT a language.DHTML is a TERM describing the art of making dynamic and interactive web pages.DHTML combines HTML, JavaScript, the HTML DOM, and CSS.Before learning DHTML you should already know CSS,JavaScript and HTML.DHTML stands for Dynamic HTML.DHTML is NOT a language or a web standard.To most people DHTML means the combination of HTML, JavaScript, DOM and CSS.According to the World Wide Web Consortium (W3C):”Dynamic HTML is a term used by some vendors to describe the combination of HTML, style sheets and scripts that allows documents to be animated.”The W3C HTML 4 standard has rich support for dynamic content:HTML supports JavaScript.HTML supports the Document Object Model (DOM).HTML supports HTML Events.HTML supports Cascading Style Sheets (CSS).JavaScript is the most popular scripting language on the internet, and it works in all major browsers.DHTML is about using JavaScript to control, access and manipulate HTML elements.The HTML DOM is a W3C standard. It describes the Document Object Model for HTML.The HTML DOM defines a standard way for accessing and manipulating HTML documents.DHTML is about using the DOM to access and manipulate HTML elements.HTML events are a part of the HTML DOM.DHTML is about creating web pages that reacts to events.CSS defines how to display HTML elements.DHTML is about using JavaScript and the HTML DOM to change the style and positioning of HTML elements.So,Dhtml is totally a combination Of Html, CSS, Html and JavaScript.

Learn XML for Ajax

2011-12-07T07:02:50Z

XML stands for eXtensible Markup Language.XML is designed to transport and store data.XML is important to know, and very easy to learn.While Html was designed to display the data,so this is the difference between two languages.Before starting with XML you should already know Html and JavaScript.Now what is XML?XML stands for EXtensible Markup Language.XML is a markup language much like HTML.XML was designed to carry data, not to display data.XML tags are not predefined. You must define your own tags.XML is designed to be self-descriptive.XML is a W3C Recommendation.XML is not a replacement for HTML.XML and HTML were designed with different goals: XML was designed to transport and store data, with focus on what data is.HTML was designed to display data, with focus on how data looks.HTML is about displaying information, while XML is about carrying information.XML doesn’t do anything.Maybe it is a little hard to understand, but XML does not DO anything. XML was created to structure, store, and transport information.with XML we can invent our own tags.The tags in the example above are not defined in any XML standard. These tags are “invented” by the author of the XML document.That is because the XML language has no predefined tags.The tags used in HTML are predefined. HTML documents can only use tags defined in the HTML standard.XML allows the author to define his/her own tags and his/her own document structure.XML is a complement to HTML not a replacement.It is important to understand that XML is not a replacement for HTML. In most web applications, XML is used to transport data, while HTML is used to format and display the data.Xml is everywhere.XML is now as important for the Web as HTML was to the foundation of the Web.XML is the most common tool for data transmissions between all sorts of applications.XML is used in many aspects of web development, often to simplify data storage and sharing.XML is used in many aspects of web development, often to simplify data storage and sharing.XML is used in many aspects of web development, often to simplify data storage and sharing.XML is used in many aspects of web development, often to simplify data storage and sharing.XML is used in many aspects of web development, often to simplify data storage and sharing.If you need to display dynamic data in your HTML document, it will take a lot of work to edit the HTML each time the data changes.With XML, data can be stored in separate XML files. This way you can concentrate on using HTML for layout and display, and be sure that changes in the underlying data will not require any changes to the HTML.With a few lines of JavaScript code, you can read an external XML file and update the data content of your web page.Xml simplifies data sharing.XML data is stored in plain text format. This provides a software- and hardware-independent way of storing data.Exchanging data as XML greatly reduces this complexity, since the data can be read by different incompatible applications.

Learn CSS For Ajax

2011-12-05T06:32:16Z

CSS stands for Cascading Style Sheets.CSS saves a lot of work.Before learning CSS we should know the basics of HTML.CSS stands for Cascading Style Sheets.Styles define how to display HTML elements.Styles were added to HTML 4.0 to solve a problem.External Style Sheets can save a lot of work.External Style Sheets are stored in CSS files.CSS defines HOW HTML elements are to be displayed.Styles are normally saved in external .css files. External style sheets enable you to change the appearance and layout of all the pages in a Web site, just by editing one single file.CSS Syntax, a CSS rule has two main parts: a selector, and one or more declarations.The selector is normally the HTML element you want to style.Each declaration consists of a property and a value.The property is the style attribute you want to change. Each property has a value.A CSS declaration always ends with a semicolon, and declaration groups are surrounded by curly brackets.Comments are used to explain your code, and may help you when you edit the source code at a later date. Comments are ignored by browsers.A CSS comment begins with “/*”, and ends with “*/”, like this.In addition to setting a style for a HTML element, CSS allows you to specify your own selectors called “id” and “class”.The id selector is used to specify a style for a single, unique element.The id selector uses the id attribute of the HTML element, and is defined with a “#”.The style rule below will be applied to the element with id=”para1″.The class selector is used to specify a style for a group of elements. Unlike the id selector, the class selector is most often used on several elements.This allows you to set a particular style for many HTML elements with the same class.The class selector uses the HTML class attribute, and is defined with a “.”.There are three ways of inserting a style sheet:External style sheet,Internal style sheet, In-line style sheets.

Learn JavaScript For Ajax

2011-12-05T06:25:46Z

JavaScript is the scripting language of the Web.JavaScript is used in billions of Web pages to add functionality, validate forms, communicate with the server, and much more.avaScript is the most popular scripting language on the internet, and works in all major browsers, such as Internet Explorer, Firefox, Chrome, Opera, and Safari.Before you lean JavaScript you should already know html and CSS.Now what is JavaScript?JavaScript was designed to add interactivity to HTML pages.JavaScript is a scripting language.A scripting language is a lightweight programming language.JavaScript is usually embedded directly into HTML pages.JavaScript is an interpreted language.Everyone can use JavaScript without purchasing a license.Now a question comes are Java and JavaScript same ?everyone gets confused at this point,well I have an answer for this is NO.Java and JavaScript are two completely different languages in both concept and design.Java (developed by Sun Microsystems) is a powerful and much more complex programming language – in the same category as C and C++.Now what JavaScript can do ?JavaScript gives HTML designers a programming tool – HTML authors are normally not programmers, but JavaScript is a scripting language with a very simple syntax.Almost anyone can put small “snippets” of code into their HTML pages.JavaScript can react to events – A JavaScript can be set to execute when something happens, like when a page has finished loading or when a user clicks on an HTML element.JavaScript can read and write HTML elements – A JavaScript can read and change the content of an HTML element.JavaScript can be used to create cookies – A JavaScript can be used to store and retrieve information on the visitor’s computer.avaScript is an implementation of the ECMAScript language standard. ECMA-262 is the official JavaScript standard.Go through the basics of JavaScript and we can learn it better.

Learn Html For Ajax

2011-12-05T06:19:02Z

Html stands for Hypertext Markup Language and why it is called markup language because it make use of markup tags. etc..With HTML you can create your own Web site.Html consists of four main parts:html,head,title and body.Html marks the start of the coding,head includes title of the webpage we are creating,title gives a brief heading to the webpage and body includes all those things which we want to insert in our page.HTML is a language for describing web pages.HTML uses markup tags to describe web pages.HTML markup tags are usually called HTML tags.HTML tags are keywords surrounded by angle brackets like .The first tag in a pair is the start tag, the second tag is the end tag.Start and end tags are also called opening tags and closing tags.HTML documents describe web pages.HTML documents contain HTML tags and plain text.HTML documents are also called web pages.The purpose of a web browser (like Internet Explorer or Firefox) is to read HTML documents and display them as web pages. The browser does not display the HTML tags, but uses the tags to interpret the content of the page.The text between and describes the web page.The text between and is the visible page content.The text between h1 and /h1 is displayed as a heading.The text between p and /p is displayed as a paragraph.HTML can be written and edited using many different editors like Dreamweaver and Visual Studio.When you save an HTML file, you can use either the .htm or the .html file extension. There is no difference, it is entirely up to you.An HTML element starts with a start tag / opening tag.An HTML element ends with an end tag / closing tag.The element content is everything between the start and the end tag.Some HTML elements have empty content.
Empty elements are closed in the start tag.Most HTML elements can have attributes.HTML documents consist of nested HTML elements.
/i/b.By learning basics and most common tags of html we can create our own website and this will help us in Ajax too.

Learn Ajax

2011-12-01T08:30:31Z

Ajax stands for Asynchronous JavaScript and XML.AJAX is not a new programming language, but a new way to use existing standards.AJAX is the art of exchanging data with a server, and update parts of a web page without reloading the whole page.Before learning Ajax you should already know Html, Css, JavaScript and Xml as they will help you to learn this language fast and in a easier way.AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.Examples of applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.Now how Ajax works,first of all an event occurs in our browser,then we create and XmlHttprequest object and send this object to server.The server then process the request,create a response and send the data back to the browser.The browser then updates the information accordingly using Javascript.AJAX is based on internet standards, and uses a combination of:XMLHttpRequest object,JavaScript/DOM,CSS,XML.AJAX was made popular in 2005 by Google, with Google Suggest.Google Suggest is using AJAX to create a very dynamic web interface: When you start typing in Google’s search box, a JavaScript sends the letters off to a server and the server returns a list of suggestions.This was all about Ajax working and functioning,this help you to understand Ajax better.

Speed up firefox

2011-06-09T15:10:38Z

With the kind of internet connections we have now, web pages load almost in the blink of an eye. But still, a few tweaks can help you make your firefox a tad bit faster.

I tried this on a 2mbps broadband connection. I don’t think this will work on anything slower.

1.Type “about:config” into the address bar and hit return. Scroll down and look for the following entries:

network.http.pipelining network.http.proxy.pipelining network.http.pipelining.maxrequests

Normally the browser will make one request to a web page at a time. When you enable pipelining it will make several at once, which really speeds up page loading.

2. Alter the entries as follows:

Set “network.http.pipelining” to “true”

Set “network.http.proxy.pipelining” to “true”

Set “network.http.pipelining.maxrequests” to some number like 30. This means it will make 30 requests at once.

3. Lastly right-click anywhere and select New-> Integer. Name it “nglayout.initialpaint.delay” and set its value to “0″. This value is the amount of time the browser waits before it acts on information it recieves.

If you’re using a broadband connection you’ll load pages MUCH faster now!

But if your browser is still sluggish, then you’ll have to consider the condition of your operating system. Either you have too many stuff running in the background (if you are using a windows OS), or you need more RAM. If the former is the case, uninstalling unwanted applications can help. Even though a browser necessarily ‘downloads’ pages from the web, displaying it on screen requires free RAM. So, if you can at least turn off some of it while you are browsing, you’ll experience better speed. If you are the tech savvy type, or maybe willing to learn, press ctrl+alt+del and switch to the processes tab. End all the processes u don;t need. This needs some getting used to but try experimenting stuff. The worst u can do if you end a process is shut down your computer accidentally

AJAX – An Overview

2011-05-12T23:41:52Z

If you think AJAX is a cleanser that works great on the bathtub, you may be a bit behind the times, technologically speaking. AJAX, which stands for Asynchronous JavaScript and XML is an updated method for using existing coding standards to create fast loading, dynamic web pages.
AJAX isn’t new, and it’s not another programming language. It’s simply a new way to use the programming standards that already exist to accomplish what’s needed. AJAX is a method of exchanging data with an Internet server and updating portions of a web page without having to reload the entire page. What the Macbook Pro, for instance, has done to computers, AJAX has done to website design.
Before you attempt to learn AJAX, you’ll need some foundational knowledge to make it work. At a minimum, you’ll want at least a basic understanding of CSS, HTML and/or XHTML, DOM / JavaScript. You don’t have to be an expert in these topics, but without a simple understanding of them, you’ll have nothing on which to base your AJAX learning.
AJAX works by exchanging small bytes of data with your Internet server. This is all done behind the scenes and isn’t visible to the site user. This allows you to update just a part of the page and not have to reload the full page, unlike traditional pages that have to reload the entire page if the content changes.
Many applications and websites today are already using AJAX. Some of these include Gmail, Google Maps, Facebook and Youtube. AJAX uses a combination of requests such as XMLHttpRequest object to allow the page to exchange data with the server as a background operation that’s not visible to the site visitors; Document Object Model (DOM) / JavaScript to create interactive pages and displays, CSS to format the data, and XML for transferring information.
Because AJAX is based on existing standards that have been in use by programmers and website developers for years, it’s easy to learn with the basic knowledge as mentioned above. As noted elsewhere on this site, pages created dynamically with AJAX do have some drawbacks.
For one, because of the dynamic format and the fact that pages don’t automatically register with the browser history, clicking the browser’s “Back” button may not return the browser to the earlier state but could go back to the last full page load. In addition, it’s difficult to bookmark a dynamically-created page. And users whose browser doesn’t support JavaScript or XMLHttpRequest, or can use the pages created in AJAX properly.
Even with the minimal amount of drawbacks, AJAX offers a tremendously easy to learn, readily accessible method for creating dynamic pages that are interactive and seemingly intuitive to the users’ needs. If you’re familiar with other aspects of website creation, it wouldn’t be hard at all to pick up what you need to make use of this powerful website programming method.

Vishing: Like Any Disease a Little of the Cause Can Contribute to the Cure

2011-05-12T23:42:19Z

If you’re only a pseudo-programmer, or even just been surfing the web ever since its waves started riding in, you know all about the kinds of Internet con games that can seduce many net novices. It’s not just that you can discern the typically poorly translated and inconsistent language used in most phishing schemes; you know the capabilities these predators have. Attempts at information superhighway robbery are for the most part lost on you, so instead you make it a mission to tell all the older people in your family with computers to not bother responding to that dethroned prince’s email.
But these crooks are onto you. That is, they know you and others like you thwart their efforts by spreading awareness to friends and relatives about sketchy emails asking for bank information or credit card numbers. Like any primordial creature obsessed with only the task of preserving its own skin, these people evolve their tactics to survive. These days they’ve perfected their technique to include traditionally trusted modes of communication like the telephone.
This new scam is called vishing. It combines the strategy of the phishing game with the trustworthiness of the landline telephone. Criminal networks from around the world spend considerable time getting a hold of finance information from specific institutions and creating a voicemail that will be left en masse on thousands of home phones. They may steal a databank of phone numbers, perform a reverse directory search, cross reference the resulting list of names, and find the information they’ll use to bait in the ensuing phone call. It’s not out of the ordinary for one of these networks to collect tens of thousands of files from multiple institutions in a single day. If they can execute a successful scam on just a few of them, they could conceivably steal tens of thousands of dollars in one 24-hour period.
I can’t say I can tell you how to catch these creeps out right, but you can continue the awareness campaign and just update the protocol. These people will typically try and call from a number that appears legitimate; to convince the potential victim the call is really coming from a trusted institution like a credit card company’s headquarters or even a local bank. Inform your friends and relatives about reverse phone lookup, a service readily available online, that allows you to search the listed name and address of an unknown number. If they have any doubt as to whether a phone call is really coming from a bank or otherwise, they should get online and run the number through the same system these crooks use to find their information.
As long as people like you continue to spread the word, the word is going to have to change with the ever evolving tactics that come about. Predators don’t give up easily. Be a good game warden and don’t give up either.