introduction
1. this textarea is like the google calendar's description when you create one new or update one existence calendar;
2. its height will be changed accroding to user's input;
3. its scrollbar is removed, which makes it much user friendly. i guess you may like it.
using the code
1. import the jquery.js and textarea.js
2. add the following css
3. add one textare html control
4. make it works