Gerald,

>May be you have put the button on a form and missed another level...
>
>this.document.frames(0).document.forms(0).home.disabled = ("APP_MAIN.HTM"$UPPER(url))

That was a good thing to point out to me, however, I'm certain I don't have another level to drill down into. Besides, as I've noted, the VFP debugger has no problem finding the reference to "this.document.frames(0).document.home" so it must be the correct object hierarchy.

Mike.