html dom w3c dom html HTMLTableColElement htmltablecolelementimpl htmlelementimpl htmltablecolelement serialversionuid l getalign capitalize setalign align align getch ch ch ch ch.length ch ch.substring ch setch ch ch ch.length ch ch.substring ch getchoff setchoff choff choff getspan setspan span string.valueof span getvalign capitalize setvalign valign valign getwidth setwidth width width htmltablecolelementimpl htmldocumentimpl owner name owner name