$(document).ready(function() {
  ...stuffs...
  myFunction(par1, par2, anotherFucntion_callback);
 }
);

function anotherFunction_callback(data) {
 ..stuffs..
}

myFunction(par1, par2, anotherFunction_callback);

var temp = function() { anotherFunction_callback(data) };

function temp() { myFunction_callback(data) };
// even though this looks just like a free function,
// you still define it inside the ready(function())
// that's why I call it "alternative". They are equivalent.

$(document).ready(function() {});