The create and delete methods on the table allow authors To construct and modify tables. HTML 4.01http//www.w3.org/TR/1999/REC-html401-19991224 specifies that only one of each of the CAPTION THEAD and TFOOT elements may exist in a table. Therefore if one exists and the createTHead or createTFoot method is called the method returns the existing THead or TFoot element. See the TABLE element definition in HTML 4.01....nodes are the same (in other words, whether they reference the...a given namespace URI, if present, and null if not. When multiple...