How can I remove the border of a textArea in extJs?

I am new to extJs. I want to make the border of a textarea invisible so that it becomes just a blank white space (My purpose is to show it inside a fieldset).

Hoe can I achieve this?

th开发者_开发百科anks

use the style: border: none; so:

var textArea = {
fieldLabel: 'Test',
style: 'border: none;',
hideBorders: true
};