Rather than have standalone functions rtrim, ltrim, and trim (as in http://www.bytemycode.com/snippets/snippet/397/) why not have them as methods of all string objects?

Get a List of Folders and/or Files

Center Pop-up

A simple back button in JavaScript.

Change the case of an array.

function to validate mac address

Remove control character from a string

Find min and max of an array

A prototype function to get an array of elements by id in an array

Gives you control to perform actions when the control key and the mouse button is clicked in the same time. Something similar to selecting elements in Windows with ctrl+click.

Just change the event.ctrlKey to event.shiftKey to make it shift+click. If you don't get it don't worry the snippet contains the demo for shift+click too.

You may need to change the event.which though 1 = left click, 2 = middle click, 3 = right click(at least in firefox 1.5.0.5)