I've got a function to remove a number of rows from the end of my table. It works fine in Opera 9 but FF can't seem to get the number of rows of the table correctly.

Basically if I add new rows the tbl.rows.length in FF doesn't take account of these new dynamic rows and just returns how many rows were in the table when the page began (I don't think there are any syntax errors in the table).

function remove_row()
{
var tbl = document.getElementById('dt');
var lastRow = tbl.rows.length;

tbl.deleteRow(lastRow-1);
lastRow--;

tbl.deleteRow(lastRow-1);
lastRow--;

tbl.deleteRow(lastRow-1);
lastRow--;

tbl.deleteRow(lastRow-1);
lastRow--;

tbl.deleteRow(lastRow-1);
lastRow--;

return true;
}