TextAreaExpander is a jQuery plugin that expands and contracts the height of a textarea depending on the quantity of text added by the user.
This jQuery plugin has been created by Craig Buckler of Optimalworks.net for SitePoint.com.
For more information and implementation instructions, please view the SitePoint article How to Build an Auto-Expanding Textarea jQuery Plugin and examine the jquery.textarea-expander.js code.
Please use the code as you wish at your own risk. It is provided as-is without warrranty of any kind.