Everyday, we look at dozens of websites. The structure of these websites is defined in HTML, the lingua franca for publishing information on the web. Your browser's job is to render the HTML according to the specs (most of the time, at least). You can look at the code behind any website by selecting the "View source" tab somewhere in your browser's menu. HTML consists of so-called tags, like the A tag for links, IMG tag for images and so on. Since tags are nested in other tags, they are arranged in a hierarchical manner, and that hierarchy can be represented as a graph. I've written a little app that visualizes such a graph, and here are some screenshots of websites that I often look at.

Here is a list of sample codes to show different ways to create windows and dialogs. You can view source of each example, even edit it and test your modification immediatly in your browser. Just click again on the link to open a new window/dialog with the modified code. Each window uses a javascript function to get a new id and DO NOT call setDestroyOnClose(). You can open the debug window if you want to see some debug outputs...
view example

By Michael Bernard & Melissa Mills
By far the two most common types of fonts currently used on the Web are the serif font, Times New Roman (TNR) and the sans serif font, Arial. The question is, which one is more legible and at which size? In the past, it has been determined that serif fonts, which have ornamental strokes at the tip and base of each letter, are easier to read on paper than sans serif fonts, which do not have serifs. This is because it is believed that serifs help distinguished each individual letter (Albers, 1963). However, this benefit may be reduced or even eliminated on computer screens because of their display particularities, like poorer screen resolution and aliasing or "jaggies," as it is commonly known...
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Many exciting new functions and features are being thought up for CSS3. I will try and showcase some of them on this page, when they get implemented in either Firefox, Opera or Safari/Webkit.
joosdevalk

trovo ancora dei siti professionali senza P.Iva indicata, per cui mi sembra opportuno ricordare l’articolo 35 del decreto del Presidente della Repubblica n. 633 del 1972 che è sostituito dal seguente:

“Art. 35 (Disposizione regolamentare concernente le dichiarazioni di inizio, variazione e cessazione attività). - 1. I soggetti che intraprendono l’esercizio di un’impresa, arte o professione nel territorio dello Stato, o vi istituiscono una stabile organizzazione, devono farne dichiarazione entro trenta giorni ad uno degli uffici locali dell’Agenzia delle entrate ovvero ad un ufficio provinciale dell’imposta sul valore aggiunto della medesima Agenzia; la dichiarazione è redatta, a pena di nullità, su modelli conformi a quelli approvati con provvedimento del direttore dell’Agenzia delle entrate. L’ufficio attribuisce al contribuente un numero di partita I.V.A. che resterà invariato anche nelle ipotesi di variazioni di domicilio fiscale fino al momento della cessazione dell’attività e che deve essere indicato nelle dichiarazioni, nella home-page dell’eventuale sito web e in ogni altro documento ove richiesto.”

Aggiungo anche questa risoluzione del 16/05/2006 n. 60

Indicazione numero partita Iva nel sito web - articolo 35,comma 1, del D.P.R. n. 633 del 1972  

Lightbox JS is a simple, unobtrusive script used to overlay images on the current page. It's a snap to setup and works on all modern browsers.

Description: This tab content script uses Ajax to let you display a selection of external content on your page inside a DIV and via CSS tabs! We got our inspiration for this script from Yahoo's new homepage, which employs such a concept to show news in an organized fashion. Below lists the features of this script that together make it highly adaptable in the real world: Fetch and display an external page (from the same domain) inside a container when a tab is clicked on. Add a "default" content inside the container to either be shown while no tabs are selected, or to be associated with a specific tab. The default content is added directly to your page and not fetched via Ajax, for sake of server efficiency. For each tab, you can not only fetch an external page to be shown, but also load external .css and .js files associated with that page if desired. Supports multiple Ajax Tabs Contents on the same page. Fully unobtrusive, search engine friendly script. The tabs are simply list based links. For search engines or browsers with JavaScript disabled, the contents will just load as actual pages (instead of inline via Ajax).

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