[Javascript] Netscape 4x and text form fields

[Nancy Burton-Vulovic]

I need to be able to "gray out" text fields in Netscape 4x if a certain
radio button is checked. I need them to be both visually distinct and unable
to accept text. I wrote a script that works fine in IE5x and NS6.2, using
document.form.field.style.bgColor and document.form.field.disabled, but it
doesn't do anything at all in NS4x. Any hints?

TIA
Nancy