3 Browser Visibility
Layering for Internet Explorer 4/5, Netscape 4x, and Netscape 6. It's not as easy as some of the examples from the big web sites seem to show. I spent four hours with their demos before getting it right. This one doesn't break on Netscape 3 either although of course version 3 doesn't support layering.

Using CSS in Form Fields
Sometimes you want to gray out a blurred form field. You can do that with CSS and additionally manipulate the look and feel of the form field using a combination of CSS and Javascript.

A Tabbed Index
Create a tabbed index using Javascript and CSS. Then use DHTML to display only the selected section of information in one panel. Also learn to script keyboard events. Requires IE5+ or Netscape 6.

Sortable Tables!
I thought that I'd need separate files for multiple sorts on HTML tables. Then I found this solution. Read about it along with links to .asp and .php3/4 examples.

Click Buttons to Learn Array Functions
Push/Pull, Slice and Splice, Join or Reverse, Sort and more...