[jQuery] Getting Last ID

Hi,

I am dynamically creating/removing entire rows in a form.

function addNewRow(newId)
{
var tbody = document.getElementById('list').tBodies[0];
var lastRow = tbody.rows.length - 1;
var newId = lastRow;

var row = document.createElement('tr');
row.setAttribute('id', newId);

Using var lastRow = tbody.rows.length - 1;
to create the new id does not work for me.

If I have 3 rows
1
2
3
and then I remove row id 2, with the length method, when adding a new row
after that removal I end up with
1
3
3

What is the best method to get the last ID so I have

1
3
4

Thank you.
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