для работы getElementById требуется DOCTYPE

Misha v.3 13.10.2014 11:23 / 13.10.2014 11:27

добавьте после xml declaration, например такое:

<!DOCTYPE document [
  <!ATTLIST div    id           ID     #IMPLIED>
]>

w3.org:

Note: The DOM implementation must have information that says which attributes are of type ID. Attributes with the name "ID" are not of type ID unless so defined. Implementations that do not know whether attributes are of type ID or not are expected to return null.

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