Webkit, iframe and windows redraw

[para]

Hi,

I have a frame which include mootools and "morph" an element in the
parent window.
The problem is that with webkit (chrome included) element is not
redrawed (if I move my mouse, element is redrawed).

I try to do that in "create()" method (Function.js) (i have added
window.parent.):

                        if (options.delay) return 
window.parent.setTimeout(returns,
options.delay);
                        if (options.periodical) return 
window.parent.setInterval(returns,
options.periodical);

And it works.

Do someone already had this problem ?

Thanks