textarea. readonly with javascript

[Fi_C**]

I need to make a textarea readonly, this works fine using HTML in internet explorer and modzilla however netscape is a different story...
How do I do this using javascript...?
ps I have never used javascript before so treat me as a complete beginner!!

[Fi_C**]

It's Netscape 4.79/U.S.

thanks

[Fi_C**]

Thanks for dat code..
is all of it necessary or will this line on it's own work

it seems to be ok..
$textarea = "<textarea onFocus=\"this.blur()\" cols=20 rows=5 READONLY>";
thanks again