Loading widget after domready event

I am trying to load the widget after domready event ( so that it does not slow down the rest of the page ). I am doing something like this:
YAHOO.util.Event.onDOMReady( function() { feedback_widget = new GSFN.feedback_widget(feedback_widget_options); });

The problem is that if i do this the page goes blank.
Is there some kind of trick? Can i place a div in my dom and provide an ID as a parameter to the feedback_widget?

Thank you.