Javascript: Show all properties for an object

I would like to see all the properties of a given object.

OK - Here you go:

     function popUpProperties(inobj) {
        op = window.open();
        op.document.open('text/plain');
        for (objprop in inobj) {
        op.document.write(objprop + ' => ' + inobj[objprop] + '\n');
        }
        op.document.close();
    }

Ex.:

popUpProperties(document.forms[0]);

Nice...