Textarea: Size of a window with no border

How do you make a textarea with no b开发者_如何转开发order and takes up all of the space it can?

Thanks everybody!

---

Here it is:

<style type="text/css">
textarea.test
{  
width: 100%;
height: 100%;
border-color: Transparent;     
}
</style>
<textarea class="test"></textarea>