Text Area that contains HTML??

I want a Text Area like this website has <a href="http://www.dscons.com/sitemap.html">click here</a>
that contains HTML

How do i make that?

THanks for anyone that can help

The <textarea> element can not display formatted HTML code inside of it. They
are using a <div> tag that has been modifed with CSS to display a scroller on
it.

#scrollbox { overflow:scroll; }

Here's a tutorial: http://www.quirksmode.org/css/overflow.html

Yea i thought they had but i couldent get round it how to do it

Thanks