[jQuery] Apply "xpath-evaluate" in an iframe document

[julio]

Hi,

I have a simple iframe in a html page that loads a local html page.

I would like hide all images in this iframe-page (that working for
Firefox/IE6-7 at least).

And so I wrote this code:

// this code gets correctly frameDocument for IE 6-7 and Firefox
var frame = document.getElementById("myframe");
var frameDocument = (frame.contentWindow || frame.contentDocument);
if (frameDocument.document) frameDocument = frameDocument.document;

// not working
$(frameDocument).("//img").hide();

last row returns (via Firebug) this error:

"XML filtering predicate operator called on incompatible Object"

Have you any idea how to fix it (for Firefox and IE 6-7 at least)?

Thanks,
Julio