Recent moods on input fields presentation tend to insert as initial value of an empty form field its label value.
Collapsible accordion with first item expanded at page load
SoundManager 2 is a Javascript Sound API which talks to Flash, effectively mapping most of Flash 8's native sound capabilities to Javascript. It enables web developers and front-end engineers to programmatically control sound in a cross-browser/platform
Strapdown.js makes it embarrassingly simple to create elegant Markdown documents. No server-side compilation required. Use it to quickly document your projects, create tutorials, home pages, etc.
Scriptaculous, MooTools, jQuery and much more: all you need to develop modern web interfaces and add new features to your website.