Need some help from javascript gurus.

I have one page where http://www.google.com/finance/converter is embedded inside IFrame. I am able to get the event notification whenever Google Finance page loads. Now problem is this that contents of this page is not accessible through javascript. It seems to be some security issue (firebug notified). Is there any workaround so that I can access values (result and select boxes) using javascript?

I am using ..

function iframe_loaded(){
  $("#frame").contents().find("select");  // returns 0 elements
}