2010/07/27

The Google Public Data Explorer makes large datasets easy to explore, visualize and communicate. As the charts and maps animate over time, the changes in the world become easier to understand. You don't have to be a data expert to navigate between different views, make your own comparisons, and share your findings....

2010/07/25

Used to create the old-school Infinite Bobs demo effect.

2010/07/16

The Boyer–Moore string search algorithm is a particularly efficient string searching algorithm, and it has been the standard benchmark for the practical string search literature. It was developed by Bob Boyer and J Strother Moore in 1977. The algorithm preprocesses the target string (key) that is being searched for, but not the string being searched in (unlike some algorithms that preprocess the string to be searched and can then amortize the expense of the preprocessing by searching repeatedly). The execution time of the Boyer-Moore algorithm can be sub-linear: it doesn't need to check every character of the string to be searched, but rather skips over some of them. Generally the algorithm gets faster as the key being searched for becomes longer. Its efficiency derives from the fact that with each unsuccessful attempt to find a match between the search string and the text it's searching, it uses the information gained from that attempt to rule out as many positions of the text as poss...

2010/06/17

Drugsonderzoeker en docent Ton Nabben is verbonden aan het Bonger instituut voor ciminologie (UVA) in Amsterdam. Het uitgaansleven, recreatief drugsgebruik, drugstrends en beleid hebben zijn speciale aandacht. Vanuit zijn functie heeft hij een proefschrift en boek geschreven; High Amsterdam, ritme roes en regels in het uitgaansleven. Het boek beschrijft het falen van de zero-tolerance politiek en hoe het gebruik zich de afgelopen 20 jaar heeft ontwikkeld. Zijn conclusie is dat Nederland met het huidige beleid weer terug bij af is met als mooie stelling; Veiligheid is de nieuwe opium van de politiek. Een helder naslagwerk over 20 jaar (recreatief) druggebruik in Nederland....

2010/06/03

De Nederlandse Voornamen Databank geeft informatie over 500.000 verschillende voornamen die in Nederland voorkomen. Het bestand is gebaseerd op de voornamen die als eerste naam en/of als volgnaam omstreeks 1 juli 2006 bij de Gemeentelijke Basisadministratie geregistreerd waren, aangevuld met recentere eerste voornamen die verkregen zijn van de Sociale Verzekeringsbank. Daarnaast zijn er een aantal voornamen opgenomen die genoemd worden in de Prisma Voornamen (samengesteld door J. van der Schaar, bewerkt door Doreen Gerritzen), maar niet meer in Nederland gedragen worden....

2010/05/19

Lots of interesting articles about computer security.

2010/05/02

Een medewerker die afstand doet van zijn recht om pensioen op te bouwen krijgt een hoger loon, omdat er geen werknemerspremies (meer) op het loon worden ingehouden. Het loon wordt niet verhoogd voor het deel van de werkgeverspremies. De medewerker loopt dan niet alleen de bijdrage van de werkgever mis, hij zal fiscaal meestal ook in een ongunstige regeling terechtkomen. Elders wordt nader ingegaan op afstand van recht (7.)....

2010/04/26

Welcome to fsi-language-courses.org - the home for language courses developed by the Foreign Service Institute. These courses were developed by the United States government and are in the public domain. This site is dedicated to making these language courses freely available in an electronic format. This site is not affiliated in any way with any government entity; it is an independent, non-profit effort to foster the learning of worldwide languages. Courses here are made available through the private efforts of individuals who are donating their time and resources to provide quality materials for language learning....

2010/04/18

2010/03/06

2010/03/04

Het komt vaak voor dat werknemers afstand willen doen van deelname aan de pensioenregeling die hen wordt aangeboden. Veel werkgevers accepteren dat niet. De laatste jaren wordt daarbij steeds vaker de Pensioenwet als excuus aangehaald. Ten onrechte. Afstand doen van pensioen is nog steeds mogelijk....

2010/02/22

Greg Rutter's Definitive List of The 99 Things You Should Have Already Experienced On The Internet Unless You're a Loser or Old or Something

2010/02/17

This article lists some extensions that are known to cause problems.

2010/02/07

Beïnvloeden is een belangrijke vaardigheid als je samenwerkt. Eigenlijk willen we allemaal invloed uitoefenen op het werk, toch? Ben je office manager of directeur, je zal altijd je best moeten doen om anderen voor je te winnen. Houd je hoofd en je hart erbij, want door goed naar de ander te kijken, weet je welke strategie je moet gebruiken om effectief te beïnvloeden....

2010/02/07

This is a map of the wheel-ruts of modern English. Etymologies are not definitions; they're explanations of what our words meant and how they sounded 600 or 2,000 years ago.

2010/02/06

Informatie over pensioenen.

2010/01/02

The wreck site is the world largest online wreck database, we have 75.000 wrecks and positions, 8.000 images, 600 maritime charts, 10.000 ship owners and builders and a lot more.

2009/12/19

Step-by-step guide to installing Subversion on a Synology NAS.

2009/12/13

Are you tired of scanning several BitTorrent sites for the latest episodes of your favorite TV-show? You should definitely try using RSS feeds then. RSS and BitTorrent are a perfect match.

2009/10/14

A chord progression (or harmonic progression) is a series of musical chords, or chord changes that "aims for a definite goal" of establishing (or contradicting) a tonality founded on a key, root or tonic chord.[1] Chords and chord theory are generally known as harmony....

2009/10/09

Optional arguments are arguments that aren't required in order for a procedure to be compiled and run. Many built-in functions and methods take optional arguments. Adding optional arguments to user-defined procedures is an easy way to add functionality without updating all the code that calls those procedures. In addition, if you declare arguments that aren't always needed as optional, you can minimize resource use by passing only those arguments that are necessary for a given procedure call....

2009/09/28

This article describes how to customize menus and menu bars in Microsoft Excel 2000 and later. This article contains step-by-step instructions and code samples to programmatically manage and customize menu bars, menus, commands, submenus, and shortcut menus in Microsoft Excel....

2009/09/27

Well, not entirely limited to libraries. Useful stuff for visualization practitioners sounded a little non-specific, though. These are all freely available.

2009/09/27

Data visualizations and infographics can make complex datasets easier to understand and comprehend. By creating a graphical represenatation of data and statistics, complicated concepts and information can make more sense in less time. Many visualizations focus on representing a specific set of data or statistical information. Others focus on less-concrete topics, providing a visual representation of abstract concepts. Generally speaking, the first type appear more like graphs or charts and the latter are often more creative and imaginative. But visualizations and infographics can be used poorly, too. Putting in too much information (or not enough), using improper formats for the information provided, and other failures are common. Below are more than 25 useful resources for infographics and data visualization. Most are galleries of effective graphics though some also provide how-to information for information designers....

2009/09/25

I thought I’d list a few helpful papers I use from time to time when going about my usability work. Some of these you may have heard of, some not. I think you’ll find these very helpful from time to time. This list is not meant to be comprehensive, rather, it’s the list of the most thumb-worn papers I leaf through when needed. They are all free, and are publicly available....

2009/09/25

This sub procedure creates a CommandBar and adds a few buttons and popups. It is only to demonstrate how to make it work. Both buttons with a caption, an icon and both are displayed.

2009/09/21

Information about Dimple Whisky

2009/09/05

Monthly bulletin by the DEA about drug seizures in the US and "trends" on the market (Obama shaped XTC tablets?). Weird, but interesting.

2009/07/12

This Website specializes in uncensored language research protected by the First Amendment.

2009/06/16

Nathan Yau, the statistician beind data blog Flowing Data, presents his guide to what you can do with all those numbers

2009/06/07

In information technology, an inverted index (also referred to as postings file or inverted file) is an index data structure storing a mapping from content, such as words or numbers, to its locations in a database file, or in a document or a set of documents, in this case allowing full text search. The inverted file may be the database file itself, rather than its index. It is the most popular data structure used in document retrieval systems.[1] Several significant general-purpose mainframe-based database management systems have used inverted list architectures, including ADABAS, DATACOM/DB, and Model 204. There are two main variants of inverted indexes: A record level inverted index (or inverted file index or just inverted file) contains a list of references to documents for each word. A word level inverted index (or full inverted index or inverted list) additionally contains the positions of each word within a document.[2] The latter form offers more functionality (like phrase sear...

2009/06/02

I have been thinking about making a list of some of the most seminal information visualization papers. These are papers that have made an impact and can be widely seen in the media (print/web) or are being adopted in visualization software/systems such as VTK, Prefuse, Many Eyes and so on. I may have missed out on a few papers, so please feel free to add any that you think are ‘must-reads’ for an infovis researcher....

2009/05/17

My objective with this project is to make it a top quality reference about the U-boat arm with maximum accuracy and a very wide scope.

2009/05/07

Duke Nukem Forever was a computer game that had been under development by 3D Realms since its announcement on April 28th, 1997, originally slated to use the (then) state of the art Quake II 3D engine. A few months later, screen shots were published in PC Gamer magazine, along with an intended release date of mid-1998. Excitement grew in May of 1998 when a few short video clips of Duke Nukem Forever were shown at E3... Surely a final release of the game was right around the corner!...

2009/05/07

If you are finding it hard to pick the right chart type for your type of data, this easy flow chart (available as PDF and JPG) courtesy Andrew Abela should help you make the decision quickly. Start from the center and take the route that best matches your data....

2009/05/03

The Khan Academy is a not-for-profit organization with the mission of providing a high quality education to anyone, anywhere.

2009/05/01

Collection of vintage 5.25" disk sleeves.

2009/04/10

2009/04/09

This is a map of the wheel-ruts of modern English. Etymologies are not definitions; they're explanations of what our words meant and how they sounded 600 or 2,000 years ago.

2009/04/02

Let's face it: when you've run into serious productivity roadblocks like procrastination, distraction, and overwhelmed paralysis, keyboard shortcuts and index cards aren't going to save you—only better patterns of behavior will.

2009/03/30

There has been three instances that I know of where a significant number of hacked account passwords have been publicly released. I have obtained the lists and made a thorough analysis of each of them, including the most common passwords and character frequencies. In total, there were 116782 passwords....

2009/03/24

Here are ten of some of the most underused and misunderstood tags in HTML. While they might be less familiar, they're still quite useful in certain situations.

2009/03/23

SQL Server has a handy little system stored procedure named sp_spaceused that will return the space used by a database or by a particular table. To determine the size used by the database, simply run EXEC sp_spaceused

2009/03/23

The Balanced Scorecard (BSC) is a performance management tool which began as a concept for measuring whether the smaller-scale operational activities of a company are aligned with its larger-scale objectives in terms of vision and strategy.

2009/03/18

In probability theory, Bayes' theorem (often called Bayes' law after Rev Thomas Bayes) relates the conditional and marginal probabilities of two random events. It is often used to compute posterior probabilities given observations. For example, a patient may be observed to have certain symptoms. Bayes' theorem can be used to compute the probability that a proposed diagnosis is correct, given that observation....

2009/03/18

In graphic design and sociology, an Isotype is a system of pictograms designed by the Austrian educator and philosopher Otto Neurath, an active member of the Vienna Circle, in collaboration with the illustrator Gerd Arntz to communicate information in a simple, non-verbal way. Isotype stands for International System of TYpographic Picture Education. Neurath originally intended Isotype to be used by educators of young children, but it wound up instead heavily influencing modern public signage, statistical graphics, and information graphics. Visually, it owes a lot to a clean-lines, 1920s realist/deco aesthetic. In 'a picture speaks a thousand words' kind of a way, Isotype was developed as a way of conveying quantitative information with social consequences — the availability of bread and sugar, the manpower involved in constructing automobiles, in different countries. Isotype may have some common ground in intentions with Buckminster Fuller's Geoscope....

2009/03/09

Wolfram and his team have built what he calls a “computational knowledge engine” for the Web. OK, so what does that really mean? Basically it means that you can ask it factual questions and it computes answers for you. It doesn’t simply return documents that (might) contain the answers, like Google does, and it isn’t just a giant database of knowledge, like the Wikipedia. It doesn’t simply parse natural language and then use that to retrieve documents, like Powerset, for example. Instead, Wolfram Alpha actually computes the answers to a wide range of questions — like questions that have factual answers such as “What country is Timbuktu in?” or “How many protons are in a hydrogen atom?” or “What is the average rainfall in Seattle?”...

2009/03/09

The following list of 100 open courseware projects are designed to offer readers access to supplementary materials for education. They are free (hence “open”) and available to anyone who has access to the Internet.

2009/03/07

Bruce Lee was a paragon of cool and an icon of the ultimate bad-ass. Not only were his martial arts skills incredible, but he had such an impressive physique that even bodybuilders in the likes of Arnold Schwarzenegger admired him. What’s more impressive is that Bruce trained his body without ever stepping into a gym and with very little use of weights or machines....

2009/03/03

Koopt u voor het eerst een gebruikte auto? Heeft u weinig kennis van de occasionmarkt en het kopen van een occasion? Volg dan de onderstaande stappen en maak gebruik van het OccasionAdvies Handboek

2009/03/03

De RDW registreert APK-data, technische en andere gegevens van voertuigen. Op deze pagina kunt u de gegevens van voertuigen met een Nederlands kenteken opvragen.

2009/02/27

Content Management Comparison Tool

2009/02/27

So, I was thinking about this and trying to not to get too glum. I realized that instead of complaining, I could help by pointing to some papers which are easily available online and which (to me at least) point to some of the most interesting ideas about software. To me, these are classic papers which contain deep “things you oughta know” about code – the material you work with....

2009/02/23

Since Web Designer Wall launched, I’ve been featuring a lot of graphic intense websites such as the artistic, large background, vintage, and illustrative styles. Now it is time to feature the minimalist design. Here is a massive list of 50 minimal sites. See how designers use minimal elements to create high visual impact — less is more....

2009/02/21

With PHP's object-oriented (OO) language features, if you aren't already creating your applications with OO principles in mind, these seven habits will help you get started in the transition between procedural programming and OO programming.

2009/02/19

Mind mapping software is used to create diagrams of relationships between ideas or other pieces of information. It has been suggested that the mind mapping technique can improve learning/study efficiency up to 15% over conventional note taking. Some mind mapping software is 3D, though full 3D functionality is difficult to achieve with the forms of interface devices readily available to users. Some mapping programs incorporate other learning optimization techniques including electronic flashcard style testing. The following is a list of mind mapping software....

2009/02/13

Graphviz reference

2009/02/12

L'Arbre du Ténéré, known in English as the Tree of Ténéré, was a solitary acacia, of either Acacia raddiana or Acacia tortilis, that was once considered the most isolated tree on Earth — the only one within more than 200 kilometres (120 mi).

2009/02/11

In this article we’ve collected 15 different websites that will help you sharpen your business skill set in a number of different ways. Each of these sites is an incredible source of information, and some of them are easily worth reading on a daily basis....

2009/02/09

The book aims to provide a modern approach to information retrieval from a computer science perspective. It is based on a course we have been teaching in various forms at Stanford University and at the University of Stuttgart.

2009/02/06

The infochimps.org community is assembling and interconnecting the world's best repository for raw data -- a sort of giant free allmanac, with tables on everything you can put in a table. Built by data nerds, used by data nerds, it's a central source for the information you need to power the projects the world needs....

2009/02/06

2009/02/06

The TPC Benchmark™H (TPC-H) is a decision support benchmark. It consists of a suite of business oriented ad-hoc queries and concurrent data modifications. The queries and the data populating the database have been chosen to have broad industry-wide relevance. This benchmark illustrates decision support systems that examine large volumes of data, execute queries with a high degree of complexity, and give answers to critical business questions. The performance metric reported by TPC-H is called the TPC-H Composite Query-per-Hour Performance Metric (QphH@Size), and reflects multiple aspects of the capability of the system to process queries. These aspects include the selected database size against which the queries are executed, the query processing power when queries are submitted by a single stream, and the query throughput when queries are submitted by multiple concurrent users. The TPC-H Price/Performance metric is expressed as $/QphH@Size....

2009/02/06

This website attempts to walk you through the long and diverse history of a particular aspect of human endeavour: The translation of ideas, stories and concepts that are largely textual and/or word based into a visual format, i.e. visual communication.

2009/02/05

Content Management Systems have become one the internet’s most powerful web developer tools since PHP. In a market where websites need to be built faster and easier, many developers are turning to Open Source CMS to get the job done. Unfortunately there are now thousands of CMS’s floating around the web and finding the right one has become somewhat of an ordeal. This article will discuss how developers can find the right CMS for any occasion and will give a review of some of the best CMS’s I have discovered, as well as recommendations on which CMS to avoid like the plague....

2009/02/04

Chart showing different types of food and how they can be beneficial.

2009/02/03

A simple method for rating potentially revolutionary contributions to physics.

2009/02/03

“Top Documentary Films” attempts to provide information on documentaries by quoting reviews from trusted sources and placing links for more info about the documentary films. The site also offers trailers for the documentaries and full watchable documentaries. In case you decide to buy your favorite documentary film, or you want to get some more information there are links to Amazon.com....

2009/02/03

These days server naming is a bit of a lost art. Most large organizations don't allow for fanciful names and name their servers with jumbles of digits and letters. In the olden days just about every system administrator came up with a unique naming scheme, well, sometimes unique - many just settled for Star Trek characters. To this day my favorite server name is Qantas - a Unix server that Joel Spolsky has or used to have. Why Qantas? You'd have to ask Rainman. So my question is this - what is the coolest server name or naming convention that you encountered? Let the geekfest begin. This question is marked "community wiki", so I am not getting any "rep" from it....

2009/01/30

So, you're interested in single malt whisky, eh? What a coincidence - me too! Actually, I'm much more than merely 'interested' in single malt Scotch whisky; you could say that I'm quite MAD about it - hence the title of this Malt Madness site. If you are a curious novice taking your first shaky steps in the confusing world of single malt whisky, this could be the whisky website you have been looking for......

2009/01/22

The main goal of this book is to introduce the reader to the use of R as a tool for performing data mining. R is a freely downloadable language and environment for statistical computing and graphics. Its capabilities and the large set of available packages turn this tool into an excellent alternative to the existing (and expensive!) data mining tools....

2009/01/14

Hiring smart software developers is not easy. If you're not careful you might end up hiring a bunch of moronic mandrills, like I did last year. And you don't want that. Trust me. Stand-up meetings are very hard to do in a tree. The key is to ask challenging questions that enable you to distinguish the smart software developers from the moronic mandrills. And to help you with that, I decided to publish my private list of 100 interview questions for software developers....

2009/01/13

Experts Announce Agreement on the 25 Most Dangerous Programming Errors - And How to Fix Them Agreement Will Change How Organizations Buy Software.

2009/01/07

If you want to use one of the built-in icons for your custom Outlook menu item or toolbar button, you'll need to know its FaceID. Here are all the FaceID's for the builtin Outlook 2000 icons. These ID's appear to be the same across different language versions of Outlook. Select the thumbnails to see larger tables....

2009/01/05

2009/01/02

Here, then, are the best posts of 2008, selected according to their popularity and the amount of discussion they generated both here on the site and across the blogosphere. Contained in these posts is a healthy dose of the wisdom, direction, and skill you need to move forward into a successful 2009!...

2008/12/31

Mario Kart Wii marks the latest addition to the much loved and effortlessly fun racing series from Nintendo. In this guide we'll cover some of the basic control issues specific to this new incarnation, run-through each of the power-ups you have at your disposal, detail all of the characters and vehicles on offer, and of course provide an in-depth look at its 32 circuits. You can also read up on how to unlock the myriad of bonuses hidden away within. Enjoy!...

2008/12/25

SCIgen is a program that generates random Computer Science research papers, including graphs, figures, and citations. It uses a hand-written context-free grammar to form all elements of the papers. Our aim here is to maximize amusement, rather than coherence. One useful purpose for such a program is to auto-generate submissions to conferences that you suspect might have very low submission standards....

2008/12/16

Welcome to one of the Internet's premier sites for detailed PC reference information. My name is Charles, and my goal is to provide you with the answers to your computing questions. Please enjoy your stay, and come back again soon.

2008/12/11

This article shows you how to use collections in Visual Basic for Applications to manage references to class objects in Access 2000. This technique allows your class objects to persist, and enables you to control the individual properties of those objects by using the familiar collection syntax used in Microsoft Access for implementing Data Access Objects (DAO) and other Microsoft Office Object models....

2008/12/11

Collection of Excel and VBA tips.

2008/12/11

Classes are a powerful tool in intermediate to advanced level VBA programming. This page is an introduction to what a class and an object are and will hopefully get you started working with classes. This is by no means a comprehensive guide.

2008/11/30

2008/11/30

Writing well is easily one of the most sought-after and useful skills in the business world. Ironically, it is one of the rarest and most undervalued skills among students, and few professors have the time, resources, or skills to teach writing skills effectively. What follows are a handful of tips and general principles to help you develop your writing skills, which will not only improve your grades (the most worthless indicator of academic progress) but will help develop your ability to think and explain the most difficult topics. Although directed at students, most of this advice applies equally well to any sort of writing; in the end, good writing is not limited to one context or another....

2008/11/30

Joel Spolsky has compiled a book of essays on software, which he calls The Best Software Writing I. The essays all came from online sources, but when Spolsky released the chapter listing, I didn't see anywhere online where he posted links to the originals. So here they are....

2008/11/30

This system is about being organized and prepared. This will allow your ideas to flow at their fastest rate. It doesn’t necessarily mean that they will flow at lightning speed, but I think you”ll find this allows them to flow at their maximum speed.

2008/11/30

Here are 10 timeless tips to help you improve style and substance, straight from the pens of humanity’s finest authors.

2008/11/30

George Orwell has earned the right to be called one of the finer writers in the English language through such novels as 1984 and Animal Farm, such essays as “Shooting an Elephant,” and his memoir Down and Out in Paris. Orwell expressed a strong dislike of totalitarian governments in his work, but he was also passionate defender of good writing. Thus, you may want to hear some of Orwell’s writing tips....

2008/11/27

A Windows XP Optimization Guide

2008/11/27

Myths Regarding Windows XP

2008/11/24

There is not much consistency among the Excel functions and VBA functions, and the various "standards" used in business. If you need to use week numbers, you need to understand how they work and what they represent.

2008/11/23

Unlock your Nintendo Wii with the worlds first truly upgradeable Nintendo Wii Mod Chip. That's the manufacturer "hype" for the Wiikey. And it's all true. Thankfully in the case of this Nintendo Wii Mod chip, it's not just all hype and senseless features, but a robust, good chip that just works. Installing the WiiKey is as easy as can be. Even if you're just a novice when it comes to soldering, you should have no problem with installing the WiiKey in your Nintendo Wii console....

2008/11/23

2008/11/20

List of tips to optimize slow VBA code.

2008/11/19

Scrum is an agile software development framework. Work is structured in cycles of work called sprints, iterations of work that are typically two to four weeks in duration. During each sprint, teams pull from a prioritized list of customer requirements, called user stories, so that the features that are developed first are of the highest value to the customer. At the end of each sprint, a potentially shippable product is delivered....

2008/11/18

Listed below are 10 excellent techniques that PHP developers should learn and use every time they program. These tips will speed up proficiency and make the code much more responsive, cleaner and more optimized for performance.

2008/11/18

Currently only for MySQL and Microsoft SQL Server, some ORACLE and some PostgreSQL. Most of samples are not correct for every single situation. Most of the real world environments may change because of parenthesis, different code bases and unexpected, strange SQL sentences....

2008/11/11

Where can I find lists of data in useful computer formats? ie. wordlist, world cities, populations, etc.

2008/11/11

Freebase, created by Metaweb Technologies, is an open database of the world’s information. It’s built by the community and for the community – free for anyone to query, contribute to, build applications on top of, or integrate into their websites.

2008/11/11

This is a site for large data sets and the people who love them: the scrapers and crawlers who collect them, the academics and geeks who process them, the designers and artists who visualize them. It's a place where they can exchange tips and tricks, develop and share tools together, and begin to integrate their particular projects....

2010/07/30

SQL is de de-facto standaard als het gaat om applicatie-databases. Maar er wordt meer en meer getwijfeld aan het nut van relationele databases, ten gunste van het zogenaamde 'NoSQL'.

2010/07/30

The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, can follow links, and submit forms. Form fields can be populated and submitted. Mechanize also keeps track of the sites that you have visited as a history....

2010/07/30

SelectorGadget is an open source bookmarklet that makes CSS selector generation and discovery on complicated sites a breeze. Just drag the bookmarklet to your bookmark bar, then go to any page and press it. A box will open in the bottom right of the website. Click on a page element that you would like your selector to match (it will turn green). SelectorGadget will then generate a minimal CSS selector for that element, and will highlight (yellow) everything that is matched by the selector. Now click on a highlighted element to remove it from the selector (red), or click on an unhighlighted element to add it to the selector. Through this process of selection and rejection, SelectorGadget helps you come up with the perfect CSS selector for your needs....