So, I am adding some comments.
It weird, I am not sure it is related to JSF but ...
It seems that in Safari Firebug like , some functions does not exist. I put some screen captures. One is what I see in Firefox Firebug and the other one what I see in Safari Firebug.
So I do not see QueryInterface nor click. And in RF, only component ...
I found my answer, I just used jquery :
and it works like a charm