rows | NN n/a IE 4 DOM n/a
A collection of all TR elements contained in a single TABLE, TBODY, TFOOT, or THEAD element. The rows collection of a TABLE element includes all rows of the table, regardless of how they're subdivided into row groups. Collection members are sorted in source code order. Internet Explorer lets you use array notation or parentheses to access a single row in the collection (e.g., document.all.myTable.rows[0], document.all.myTable .rows (0)).
Object Model Reference
IE | document.all.tableOrGroupID.rows(i) document.all.tableOrGroupID.rows[i]

length | NN n/a IE 4 DOM n/a
| Read-only
Returns the number of elements in the collection.
Example
    var howMany = document.all.myTable.rows.length
Value Integer.

item( ) | NN n/a IE 4 DOM n/a
item(index[, subindex]) Returns a single object or collection of objects corresponding to the element matching the index value (or, optionally, the index and subindex values).
Returned Value One object or collection (array) of objects. If there are no matches to the parameters, the returned value is null.
Parameters
index | When the parameter is a zero-based integer, the returned value is a single element corresponding to the said numbered item in source code order (nested within the current element); when the parameter is a string, the returned value is a collection of elements whose id or name properties match that string.
subindex | If you specify a string value for the first parameter, you may use the second parameter to specify a zero-based integer to retrieve a specific element from the collection whose id or name properties match the first parameter's string value.

tags( ) | NN n/a IE 4 DOM n/a
tags(tagName) Returns a collection of objects (among all objects nested within the current element) whose tags match the tagName parameter.
Returned Value A collection (array) of objects. If there are no matches to the parameters, the returned value is an array of zero length.
Parameters
tagName | A string of the all-uppercase version of the element tag, as in document.all.myTable.rows.tags("TR").