1) Javascript Alert
With this JavaScript alert, when a visitor puts their cursor on the link, they get the message in the form of an alert window!

2) Popup Window
Automatically opens a small popup window and closes it after a specified time.

3) Java Banner Ads
This simple little JavaScript will print out a random banner ad each time your page is viewed.

4) Javascript Image Tooltips
This script creates 'tool tips' for images. A much nicer alternative to ALT tags.

5) Lorem Ipsum Generator
A script that generates filler text

6) Dynamic Page Indexes
Script that pulls contents of H4 tags and makes them into clickable index links

7) Advanced Password Checker
This script uses an array to store the usernames and passwords. It also uses a prompt box for username and password info and use

8) CSS Top Frame Template
This is a two rows liquid layout with the top row being static, always in view.

9) CSS Right Frame Layout
This is a two columns liquid layout with the right column being static, always in view. Tested and works in IE5+, Opera7+, and F

10) Get a filename without knowing it's correct case
Get a filename without knowing it's correct case

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4) Expand and Collapse effect for data grid
This is a little use of dynamic CSS to create expandable, and collapsible sections in data grid presentations.

5) Dynamic Modifcation of CSS Class Properties
Modifying the rendering of an element with an ID is relatively easy using document.getElementById. Modifying the attributes fo an entire class dynamically is a little more code, but the DOM does provide the means to do it through the stylesheet object; with some cross-browser variations.

6) Dynamically Create CSS Rules via Javascript
useful when you need to dynamically add CSS rules.

7) Add Style to Bulleted Number or List
This is a styling for you numbered or bulleted list, works perfectly on firefox, safari and ie

8) Cool Image Borders
This is a cool little snippet for adding image boarders and backgrounds to images

9) Universal CSS template
This is a universal CSS template suitable as a starting point for any website design you are working on

10) greasemonkey -- allmusic.com crap-blocker
greasemonkey -- allmusic.com crap-blocker