Rest assure that I very much appreciate any feedback and the errors will be corrected once the new version of the site is ready.

The script weighs in at 2.33kb and can be found here.

I wrote a short article on implementing the Java super keyword in a very simple way. Might come in handy at some point.

Also wrote a new memoize method for the Function object which can speed of function execution in certain scenarios at the expense of increased memory usage.

The first beta is ready for public viewing (and hopefully feedback) and currently supports

• Real valued functions of one variable y = f(x)
• Parameter functions for plane curves (x,y) = f(t)
• Customizable plots like curve resolution and axis positioning.
• Simple zoom functionality (not for plane curves)

Right now only one function can be plotted at a time but I hope to add support for multiple plots later on as well as some numerical methods for line intersection and maybe integrals and differentiation. (any math geeks out there are welcome to join the project)

The program uses an absolute positioned div for the graph canvas area. Each point on the curve is internally calculated and stored as the real function values. When the point is plotted it is converted to a div and positioned relative to the canvas taken axis scaling into account.

This creates a lot of divs but IE, Firefox, Opera and Safari seems to cope fine when the number is no greater than 1500 points.

All the positioning which is done unfortunately throws of IE6 and I haven't tested in IE8 (as it is still beta) but otherwise it seems to be pretty stable.

You can find it at http://www.jslab.dk/tools.plot.php

Very useful for finding text nodes.

The Scripts section will be a collection of anything which don't really fit elsewhere on the site. This will be smaller scripts which you can implement directly on your own pages.

The first script is a cross browser implementation of the in-page search feature from Apples Safari browser.

The second section is my collection of developer tools. Links, books and programs which are useful for most web developers.

This is a rather nasty bug and is likely to take some time to change. Ver. 1.0.3 has a temporary fix which should work well enough untill we have the time to look into the issue properly.

In addition some old debug code have been removed. So if you ever wondered about some strange alerts this is where they come from.

As always bug reports and comments are welcome.

The first is a introduction to regular expressions. It explains the basic use of regular expressions using some simple examples.

The second is on Validating Common Form input. I got tired of answering the questions about input validation over and over again. This series will suggest some simple regex' which you can use for validating the most common input types.