请参照微软文档:
The property is read/write for all objects except the following, for which it is read-only: COL, COLGROUP, FRAMESET, html, STYLE, TABLE, TBODY, TFOOT, THEAD, TITLE, TR. The property has no default value.
The property is read/write for all objects except the following, for which it is read-only: COL, COLGROUP, FRAMESET, html, STYLE, TABLE, TBODY, TFOOT, THEAD, TITLE, TR. The property has no default value.