AJAX (Asynchronous JavaScript and XML), is a group of interrelated web development techniques used to create interactive web applications or rich Internet applications. With AJAX, your JavaScript can communicate directly with the server, using the JavaScript XMLHttpRequest object. With this object, your JavaScript can trade data with a web server, without reloading the page.
The use of Ajax has led to an increase in interactive animation on web pages. AJAX uses asynchronous data transfer (HTTP requests) between the browser and the web server, allowing web pages to request small bits of information from the server instead of whole pages. Despite the name, the use of JavaScript and XML is not actually required, nor do the requests need to be asynchronous.
Prior Technologies To Learn:
* XHTML and CSS for presentation
* XML and XSLT for the interchange, manipulation and display of data
* Document Object Model for dynamic display & interaction with data
* XMLHttpRequest object for asynchronous communication
* JavaScript to bring these technologies together
Since then, however, there have been a number of developments in the technologies used in an Ajax application, and the definition of the term Ajax. In particular, it has been noted that:
* Apart from JavaScript, other languages such as VBScript and EGL Programming Language are also capable of the required functionality.
* XML is not required for data interchange and therefore XSLT is not required for the manipulation of data. JavaScript Object Notation (JSON) is often used as an alternative format for data interchange, although other formats such as preformatted HTML or plain text can also be used.
Advantages
* In many cases, related pages on a website consist of much content that is common between them. Using traditional methods, that content would have to be reloaded on every request. However, using Ajax, a web application can request only the content that needs to be updated, thus drastically reducing bandwidth usage and load time.
* The use of asynchronous requests allows the client's Web browser UI to be more interactive and to respond quickly to inputs, and sections of pages can also be reloaded individually.
* The use of Ajax can reduce connections to the server, since scripts and style sheets only have to be requested once.
Disadvantages
* Pages dynamically created using successive Ajax requests do not automatically register themselves with the browser's history engine, so clicking the browser's "back" button may not return the user to an earlier state of the Ajax-enabled page, but may instead return them to the last full page visited before it.
* Dynamic web page updates also make it difficult for a user to bookmark a particular state of the application.
* Because most web crawlers do not execute JavaScript code, web applications should provide an alternative means of accessing the content that would normally be retrieved with Ajax, to allow search engines to index it.
* Any user whose browser does not support Ajax or JavaScript, or simply has JavaScript disabled, will not be able to use its functionality. Similarly, devices such as mobile phones, PDAs, and screen readers may not have support for JavaScript or the XMLHttpRequest object.
Some web designers swear that table-based layouts are better than CSS-based layouts, while others believe that table-based layouts are ancient history and XHTML combined with CSS is the only real solution to coding a web site’s visual layout.
13 reasons why CSS-based layouts are superior to table-based layouts:
http://www.chromaticsites.com/blog/13-reasons-why-css-is-superior-to-tables-in-website-design/
1. The World Wide Web Consortium (W3C) created CSS to replace HTML tables, font tags, frames, and other presentational hacks of HTML elements.Build from the ground up to replace traditional Web design methods.
2. Faster download times. Reduction of file size is about 50% less
3. Shorter development time. Easily tweak the design of a thousand-page site with just a few edits of one CSS file.
4. Greater control over the typography in a Web page.
5. It's easy to write. You can create and edit CSS as easily as you can hand code HTML.
6. Improvements in accessibility. Using CSS effectively means structuring content with HTML.
7. CSS lets you output to multiple formats quickly.
8. Better control over the placement of elements in Web page.
9. The design of Web pages is separated from the content. By keeping the design in separate files linked to the HTML pages, you reduce the likelihood of your page designs falling apart over time as different contributors add to the Web page.
10. Better search engine rankings. With only HTML used for structuring content in a Web document instead of rigging tags for design, search engines will spider your Web page effectively, and more likely give you a higher page ranking.
11. CSS's :hover PseudoClass cuts down on the need to use JavaScript onmouseover calls.
12. CSS lets you use logical names for page elements. You can, for example, give a DIV the name "header", or a H1 the class "headline". It's self-describing.
Cascading Style Sheets (CSS) is a style sheet language used to describe the look and formatting of a document written in either HTML or XHTML.
Features:
* Styles define how to display HTML elements
* Styles are normally stored in Style Sheets
* External Style Sheets can save you a lot of work
* External Style Sheets are stored in CSS files
* Multiple style definitions will cascade into one
Prerequisite:
Before you start CSS you should have some basic understanding of HTML / XHTML
Pichkari ki Dhar,
Gulal ki bauchar,
Apno ka pyar,
Yahi hai yaaron holi ka tyohar.
Happy Holi!!!!
Aapne dil ka haal batana chod diya, humne bhi gehrai mein jaana chod diya. Holi se pehle hi aapne nahana chod diya?
May God gift you all the colors of life, colors of joy, colors of happiness, colors of friendship, colors of love and all other colors you want to paint in your life. Happy Holi.
Hindi Holi SMS
Tumhari holi ho number one, aur tum karo whole lotta fun! wishing you a happy & colour full holi. Happy Holi
Khaa key gujiya, pee key bhaang, laaga k thora thora sa rang, baaja ke dholak aur mridang, khele holi hum tere sang.
HOLI MUBARAK
Holi par sabhi ko sabhi rango se milkar ek rang, apko mile jo apki khusiyon ko rangin bana de.
Happy Holi
Rang udaye Pichkari rang se rang jaye duniya sari holi ke rang
aapke jeevan ko rang de ye shubha kaana hai hamari.
HAPPY HOLI
Saade rang ko galti se aap naa kora samjho,
Isi mey samaaye indradhanushi saaton rang,
Jo dikhe aapko zindagi saadagi bhari kisi ki,
To aap yun samjho satrangi hai duniya usiki,
Holi aayi satrangi rango ki bouchar laayi,
Dher saari mithai aur mitha mitha pyar laayi,
Aap ki zindagi ho mithe pyar aur khusiyon se bhari,
Jisme samaaye saaton rang yahi shubhkamna hai hamaari.
Lal, gulabi, neela, pila hathon me liya samet,
Holi ke din rangenge sajni, kar ke meethi bhent.
Pichkari ki Dhar,
Gulal ki bauchar,
Apno ka pyar,
Yahi hai yaaron holi ka tyohar.
Happy Holi!!!!
Rangon se bhi rangeen zindagi hai humari, rangeeli rahe yeh bandagi hai humari,
kabhi na bigde ye pyar ki rangoli, aye mere yaar aisi HAPPY HOLI.
Gul ne gulshan se gulfam bheja hai,
Sitaro ne aasman se salaam bheja hai,
Mubaraq ho aapko holi ka tyohar,
Humne dil se yeh paigam bheja hai.
Rango ke tyohar mein sabhi rango ki ho bharmar,
Dher saari khushiyon se bhara ho aapka sansar,
Yahi dua hai bhagwan se hamari har bar,
Holi Mubarak ho mere yaar!
Rango mein ghuli ladki kya laal gulabi hai
Jo dekhta hai kehta hai kya maal gulabi hai
Pichle baras tune jo bhigoya tha holi mein
Ab tak nishani ka woh rumaal gulabi hai.
Chadenge jab pyare rang, ek meri dosti ka rang bhi chadhana.
Lagne lagenge tumhe suhane sare rang,
Aur meri dosti ka rang chamkega hurdum tumhare sang.
Bolo sarararara....
Wish you a very mastiful and colourful Happy Holi!
Apun wishing you a wonderful,
Super-duper,
Zabardast,
Xtra-badhiya,
Xtra special,
Ekdum mast and dhinchak,
Bole to ekdum jhakaas
“Happy Holi”.
Funny Holi SMS
Me ja ja jovu hu,
Mane tharo chahero dikhto hai,
Ii thaaro kusur nathi,
Salo sab chahero aaj rangeelo hai,
Holi Mubarak!
Aapne dil ka haal batana chod diya, humne bhi gehrai mein jaana chod diya. Holi se pehle hi aapne nahana chod diya?
Rang barse bhige chunar wali, rang barse o rang barse bhige chunar wali..rang barse, are rang barse bhige chunar wali..re! Ab ghar jao nahi to jukham lag jayega.
English Holi SMS
Dipped in hues of love and trust has come the festival of Holi.
Happy Holi!!
Bright colors, water balloons, lavish gujiyas and melodious songs are the ingredients of perfect Holi. Wish you a very happy and wonderful Holi.
May God gift you all the colors of life, colors of joy, colors of happiness, colors of friendship, colors of love and all other colors you want to paint in your life. Happy Holi.
If wishes come in rainbow colors then I would send the brightest one to say Happy Holi.
A true and caring relation doesn't have to speak loud, a soft sms is just enough to express the heartiest feelings. Enjoy the festival of Holi with lot of fun.
Best wishes to you for a Holi filled with sweet moments and memories to cherish for long.
Happy Holi!
Just like a red rose that fills the world with beauty & fragrance… You have made my life so beautiful by being in it. On Holi, the festival of colors & joy I wanna say thank you for all the love & smiles you've brought to my life. Happy Holi
_________ U've
!'--.___.--'! got a
i________i CARD.
Open it...
§«§«§«§«§«§«§«§«
§ H A P P Y §
§ H O L I §
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Have a Nice Day!
I was searching for easy software to design a custom 3D box cover. This is how you design.
When you use the print screen command in Windows, it takes the image of the whole screen.
If you want to display only a particular portion of that image, you have to use an image editing tool (like MS Paint) to crop.
In case you wanted to take the image of only the active window, you can just use Alt + Print Screen (prt Scr) to take the image of the active windows alone.
Today as I opened my mail box, I found this story.. Just thought of sharing it with all of my readers...
Items Required:
• Large glass
• Ashtray or similar
• Water
• Handkerchief
Instructions:
1. Push the centre of the handkerchief into the glass, so that the edges are hanging over the outside of the rim of the glass.
2. Pour water into the glass, through the loose handkerchief. Make sure that your audience can see the water easily passing through the handkerchief into the glass. Keep pouring the water until the glass is roughly half full.
3. Pull the corners of the handkerchief so that the material is taut over the top of the glass. Hold the glass and handkerchief so that the material stays tightly stretched over the opening. For younger audiences you may like to say some 'magic words' that make the hanky water proof.
4. Place the ashtray on the top of the glass and tip it all upside down, being careful to keep the handkerchief pulled tight.
5. Hold the upside-down glass and ashtray , making sure that the glass is vertical and the handkerchief is tight. Remove the ashtray and voila! – nothing happens! The water stays inside the glass.
How does it work?
This demonstration is based on surface tension and air pressure. When the handkerchief is loose, the water can pour through the gaps in the fabric. However, when the handkerchief is pulled tight, the water molecules can form a single surface or membrane across the handkerchief due to a property called surface tension. The air surrounding us is exerting a force in all directions - air pressure. When the membrane is formed on the surface of the handkerchief, it provides a uniform surface for the air pressure to act upon. The force of the surrounding air acting upon this membrane is sufficient to overcome gravity, and so the water stays in the glass.
Source : http://1000tricks.blogspot.com/
Items Required :
• Plastic bottle with cap (fairly flexible e.g. from most soft drinks)
• Water
• Match
Instructions:
1. Place ~1 teaspoon of water into the plastic bottle.
2. Light the match and make sure it is burning well, then drop it into the bottle
.
3. Quickly screw the cap on, and squeeze the bottle with your hand five or six times (for larger bottles you may have to do it slightly more). You should see a cloud form in the bottle, then magically disappear when you squeeze it.
How does it work?
Clouds are formed when water droplets in the air cool and then collect on dust particles. In this demonstration, the dust particles were provided by the smoke from the match. The air inside the bottle was cooled by releasing the pressure after the bottle was squeezed. The temperature is changed by squeezing the bottle: the amount of air within the bottle is constant, but squeezing the plastic bottle changes the volume of the gas. Expanding the bottle causes a lowering of the air temperature – in this case, enough to cause the water gas to form a liquid – the cloud.
Tips for Success
Try adding a small amount of food colouring to the water – it can help to increase the visibility of the effect.
Source : http://1000tricks.blogspot.com/
Recently, whenever you tried to upload or update a template in Blogspot , you must have seen errors like : "bX-y6cz0v", "bX-8dyqz0", "bX-si9ejx", all sort of varieties.
Here comes the solutions:
1. Open the new template XML file in any text editor, preferably WordPad (right click --> Open With --> WordPad).
2. “Ctrl + F” and search for the word "widget id"
3. Replace the "b:widget id='Anything1'" to "b:widget id='Anything11'" (example "b:widget id='Header1'" to "b:widget id='Header11'"), you can replace the number into any number you want, but must be at least double digit, 1 to 11, 2 to 22, etc... is a good choice.
4. Save the file. And upload the template either upload the xml file or cut and paste as usual.
It Works !!!! BINGO !!!!
Go to Control Panel Home (Start -> Control Panel) -> System and Maintenance -> System.
On the left side pane, under the Tasks, Click Advanced System Settings.
Click Settings under Startup and Recovery.
Under System startup, you can change the Default operating system between Windows 7 and Vista. If you have installed any other OS, you can change between those settings as well.
Click OK and the next time you start your computer, the boot order should have changed. You can also change the time duration for which it shows to change the booting OS.
Step 1: The options are available at ‘Disk Management’.
Start Menu -> Control Panel -> System and Maintenance -> Administrative Tools -> Double Click Computer Management -> Storage -> Disk Management.
In here you should be able to see different partitions along with a partition which doesn’t have any letter assigned to it.
Step 2: Right click that partition and click Change Driver Letter and Paths.
Step 3: Click Add and Choose Assign the following driver letter. You can choose a different letter if you prefer or leave the one by default. Click Ok.
Step 4: Now if you go to Computer, you should be able to access the Vista partition.
You can always improve the efficiency of handling any computer application if you are accustomed with their keyboard shortcuts. Apart from the common ones like cut, copy, paste it may be hard to learn all the keyboard shortcuts that you need to know.
But with Microsoft Office 2007, it’s very easy as you need not learn any shortcuts before hand and you can use the keyboard shortcuts by just looking at different features that you want to use.
So how do you use keyboard shortcuts for Microsoft Office 2007 Ribbon features?
Unlike the general keyboard shortcuts here you are not pressing all the keys at the same time but one after the other. All that you have to do is click ALT and you will be seeing the keys that you need to click to browse around the features in the ribbon. If you want to go back to previous options then press Escape button.
Enjoy Fast Computing :)
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