public void head(Node node, int depth) {
if (!(node instanceof Element)) {
return;
}
Element tag = (Element) node;
String tagName = tag.tagName().toLowerCase();
if (tagName.equals(TAG_BODY)) {
extractAttribute(tag, ATT_BACKGROUND);
} else if (tagName.equals(TAG_SCRIPT)) {
extractAttribute(tag, ATT_SRC);
} else if (tagName.equals(TAG_BASE)) {