Disable Textfield

Hi,
Does anyone know how to disable a text field in a form? ReadOnly seems to only apply to IE as does Disable when I've tried them. I thought DISABLE also worked in NS but when tried it didn't. I've included a in-line style sheet in the text field along with the size, name, and onclick method. I was wondering if order mattered much in NS? I normally would look at my notes but I'm away right now. Any help would be appreciated.
Rob

try
<input onfocus="this.blur()" onchange="this.value=''
note: some thricks with copy/paste could still put value into element, this is why you need onchange.

Thanks for the reply. I'll take it from that, that there is no property that applies to NS that accomplishes this. I was hoping not to have to resort to this round about approach but I guess I'll have to. Thanks again for your reply.
Rob