{get,set,has}attr for javascript, works just like python. Sort-kinda cross-platformish!

attr.js

// add python-like functions for attr access
function getattr(x,y){
  return x[y];
}
function setattr(x,y,z){
  x[y]=z;
}
function hasattr(x,y){
  return (x[y]!==undefined);
}