function explorer($a, DRW &$r)
{
while (list($i, $v) = _each($a, $k)) {
if (isDrw($v)) {
$this->explorer($v, $r);
} else {
$r->push(array($i => $v));
}
}
}
function each(&$k)
{
return _each($this->O, $k);
}
function replaceChild($new, $old = null)
{
if (!$this->more()) {
if (isDrw($new) || type($new) == 'DRW') {
while (list($i, $v) = _each($new, $k)) {
$this->replaceChild($i, $v);
}
}
if (isEle($new) && isEle($old)) {
$this->O->replaceChild($new, $old);
}
} else {
foreach ($this->O as $v) {
_($v)->replaceChild($new, $old);
}
}
return $this;
}
