gistfile1.js

function find(what, current) {
  var ret;
  if (!current) {
    current = window.top;
  }
  for (var i=0; i < current.frames.length;i++) {
    if (current.frames[i].name == what){
      return current.frames[i];
    }
    ret = find(what,current.frames[i]);
    if (ret) {
      return ret;
    }
  }
  return null;
}