Augments and polyfills the html5 placeholder attribute.
When you focus a field it keeps the placeholder text until you start typing. This keeps users from forgetting what the field is before they start typing.
Demo: http://jethrolarson.github.io/placeholder-augment/
License: MIT or WTFPL whichever you prefer
Note: I've not updated this in a while so I'm not sure if browser support is up to 2013 standards. Feel free to contribute.