/**
* Get sibling node
* @param int $offset Offset from current node
* @return HTML_Node Null if not found
*/
function getSibling($offset = 1)
{
$index = $this->index() + $offset;
if ($index >= 0 && $index < $this->parent->childCount()) {
return $this->parent->getChild($index);
} else {
return null;
}
}
