function clone(obj) {
  var key, copy = {};
  if (!obj) {
    return;
  }

  for (key in obj) {
    copy[key] = obj[key];
  }

  return copy;
}
function clone(obj) {
  var key, copy = {};
  if (!obj) {
    return;
  }

  for (key in obj) {
    copy[key] = obj[key];
  }

  return copy;
}
function clone ( obj ) { var key , copy = { } ; if ( ! obj ) { return ; } for ( key in obj ) { copy [ key ] = obj [ key ] ; } return copy ; }
Clones an object
Clones an object