The tr element represents a row of cells in a table.
A tr element must have a start tag.
A tr element’s end tag may be omitted if the tr element is immediately followed by another tr element, or if there is no more content in the parent element.
interface HTMLTableRowElement : HTMLElement { readonly attribute long rowIndex; readonly attribute long sectionRowIndex; readonly attribute HTMLCollection cells; HTMLElement insertCell(optional long index); void deleteCell(long index); };