Google posted an AdSense blog entry in March stating that most mis-clicks by AdSense vendors were automatically discounted. But this draws to light a bigger issue - how does Google know who you are?

Forms with multiple file upload boxes are a nuisance. You're stuck with hard-coding a defined number of uploads or using PHP or ASP to decide how many upload fields to have. Or are you? Here's a way to dynamically add File Upload inputs on the fly using Javascript.

We know that the target attribute is not part of the XHTML 1.0 spec. So how do we validate XHTML code, retain accessibility, and still have our external links open in a new window? Javascript, of course!

The benefits of SEO (Search Engine Optimisation) are obvious. A good ranking in major search engines and ease of discovery can do wonders for your site's traffic. However, good SEO is not a black art - it's just good, common sense.

Obviously, the first thing you need in a dynamically-driven site is a database connection. You could use PHP's mysql_* functions, but this ties you to a MySQL database. A much better idea is to abstract common functions. If the site moves to a new database, these can be rewritten without altering the rest of your code.

AJAX was the buzzword of last year, and looks to continue to be the Big Thing in 2006, highly touted as an integral part of the 'Web 2.0' framework. Although AJAX is just an old idea with a new name, it's certainly a valuable tool in your arsenal.

The Web Content Accessibility Guidelines are strict and comprehensive. But still, the web is awash with non-compliant sites, browser-specific code and all kinds of platform-dependant functionality. Why should we adhere to the WCAG? Why should we try to save the world?

I came across a website (decloak.com) the other day that, amongst other things, provides a 16-point list of arguments for designing web pages using tables instead of CSS. I thought that the arguments were particularly flawed and uninformed.

As much as I like CSS, it took me a while to figure out a few things. Full-screen layouts, for one. Many sites use a footer at the bottom and, as easy as it is in HTML tables, it's not quite so obvious in CSS. Here's how to do it.