Chapter II
Roberto Bifulco — Mon, 02/11/2008 - 15:06
The technology that permits the new development patterns presented in the previous chapter is AJAX. AJAX which stands for Asynchronous JavaScript and XML, is, using the Wikipedia definition:
“a group of inter-related Web Development techniques used for creating interactive Web Applications”
Javascript is a browser script language, that was born to give some simple dynamic functionalities to HTML pages. This language uses the Document Object Model to represent web documents and an object model to interact with the execution environment (the browser)[9]. Some years ago Microsoft introduced a new object handled by the browser, that now is known as XMLHTTPRequest, to make asynchronous HTTP request to handle XML format file, in order to update page's content (And so the name AJAX).
Google, through its big work on on-line software, gave a great example of using AJAX with Gmail, Docs&Spreadsheet, etc. From that moment, AJAX gets great attentions and now almost all browsers support the XMLHTTPRequest object.
The bigger AJAX advantage is the possibility to fetch data to update only a part of a web document, Before AJAX web applications were based on the click-wait-refresh model, where to update a small page content (for example a form button) a complete page reload was needed. AJAX, on the other hand, grants the possibility to make a partial reload of a page in an asynchronous way, fetching only the page's part that needs an update. So, a single page is loaded just one time and then updated through a sequence of asynchronous requests, reducing drastically the user's waiting time.
In Figure 3 is shown the common web client-server interaction and the ajax one: in the first a user's request is followed by a long waiting period due to the whole page reload; in the latter the user is always active because he is using an interactive dynamic interface, where requests to server are sent behind the scene.
A first look may raise a question about the overhead that would bring a sequence of requests with small data in them, but if we consider that the same application in the common web paradigm needs the resend of the entire page at each request, we can persuade ourselves of the advantages also on the net traffic side.

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Designers were unquestionably showing dresses with classic ballgown lines, but a good deal of of the fuller skirts had a lot more detail than a traditionalisti ballgown. The drama on the bottom half of the gowns gowns was devised from masses of ruffles, big draped layers, special occasion dresses and even unbelievable pinwheels and three-dimensional flower appliques. Another ordinary look is a gown that is somewhat slender through the hips and then flares into an exaggerated trumpet skirt. The styles are unquestionably eye-catching and exuberant.
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Fabrics for 2010 bridal gowns bridal gowns are trending back towards the perennial favorites, brown cocktail dress satin and taffeta. This luxe fabrics are just right for the fuller skirts that are back in vogue. You are also seeing satin gowns embellished with accents such as beaded crystal straps, which pair perfectly with crystal bridal jewelry. This is a departure from the current season, which concentered wholly on fabric accents. Brides who love sparkle will be happy to see the return of crystal jewelry detailing on the bridal gowns !
Some of the 2009 gown trends have been carried into next year’s styles. Asymmetry is still all the rage. The one shoulder gown one shoulder gown sticks around for another season, but that is only the beginning. Designers went wild with asymmetrical draping and ruching on bodices and skirts. A love of interesting architecture in the way the fabric is hung and applied is still very popular. It is rare to see a gown that has plain fabric hung without a great deal of sort of folding, pleating, or gathering. One remarkable divergence is that the bridal designers have translated this conception from the soft chiffons of 2009 into the more significant satins of 2010.
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