Simple upload class with features such as

- Upload of multiple files at the same time.
- Filtering uploads by size and extension.
- Uploads to configurable subdirs based on date.
- Automatic file renaming if a file with the same name exists.
- Transloading. Copying files from a different host to the local host. (Like Imageshack does)
- And more...

Gives you the ability to dynamically include a CSS file at any time in your HTML page using Javascript.

a simple css way to add shadow to tables and Divs

Get computed Width of an HTML Element

Not really a hack, but rather a workaround for layout problems with IE.
Conditional

Get computed Height of an HTML Element

Here's a library to manage CSS class names on DOM elements.

Attribute Selectors

Using styles we can add scrollbars for large table where the space is a constraint

Don't know if anyone will find this handly, but here's a CSS processor that I wrote that allows me to nest CSS Blocks, and various other things, making for an easier to maintain CSS file.

Warning: I'd recommend caching the results since I didn't have a need to optomize it for speed.

Things that it includes:
*Nested CSS Rules
*Removes Whitespace
*Allows for // comments
*Removes comments (so put them in at no cost)

Please let me know what you think