This is a simple function to check if an email is valid or not.

This little function does great for passwords, usernames, files, and anything else you need a random string for.

This is a simple credit card validation class that you can check for most issues before you process you form through paypal, authorize.net, or anywhere else. This also uses my Simple Error Class, the error class is required for this.

A very simple error class that can be pretty handy.

This is my MySQL database class that I use for all of my sites. Some included features are:
- Get execution time
- Error reporting (screen and email)
- SQL stats

I made this script to delete any unneeded files from the server that weren't being used by the database. Of course you can expand this a lot more, but I cut it down a little to put it up here.

it give us the position of the mouse. works on IE and Firefox

use:
onclick="posicion_mouse(event)"

Returns the keycode of the key we wrote on a textarea/input. works on IE and Firefox

Returns an array with all the objects with certain class. tested on IE 6 and Firefox 2

Simple set of functions for capturing and manipulating the className member of an HTMLElement