Cookie Handle

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

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

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

use:
onclick="posicion_mouse(event)"

Another solution recommends using a text match pattern.
This works, but as long as you've got mail.jar in your classpath anyway, you might as well use this technique instead. (Plus, I think it works with older JDK 1.2+, whereas pattern.compile is 1.4+)

Note that it also accepts a comma-separated list of emails, just like a To: or CC: address line would.

One way to group elements in HTML is to assign them a name attribute. Multiple elements can share a name, then you can easily access them as an array using the getElementsByName() method.

The problem is that some DOM parsers aren't keen on, or are ignorant to, this use of the name attribute, so a simple object.name returns undefined. In my case, it was a DIV in Firefox 1.5 that was behaving this way.

There is a simple work around for this that works in Firefox, I haven't tested it in others. It is to use the getAttribute method that is an extension of any element object.

This ability can be useful if you have a function that performs a transformation on the active element, and another transformation on closely related elements.

I use this in my AJAX as a quick way to get the Value of the selected item in a Select HTML object. If nothing is selected, it returns zero.
(May be basic to y'all, but maybe really usefull to someone else).

Enhance External Links

Fade an Element

This code allows you to set the "opcity" style attribute on a element without affecting it's content.

Just call the function for a specific element or to all elements of a given classname after the document loads.

Examples and advanced usage here...