JQuery :: Calling Functions Between Multiple Document Ready Events?

I know that you can have more than on document ready event without difficulty. i.e.

$(function(){
// document ready 1
});[code]....

The question I have is, is there any way for them to call functions from one to the other? The following does not work:

$(function(){
function displayMessage(){ alert('hello world'); };
});
$(function(){
displayMessage();
});

This invokes a js error complaining that displayMessage() is not defined.