[jQuery] Remove Column from a table

[jQuery] Remove Column from a table

Hi Folks
I need remove first a last column from a table.
To head I used
$('#myid table thead tr > th:first').remove()
$('#myid table thead tr > th:last').remove()
Works fine but to body I am trying without sucess.
I tried this but how you can see will delete only first and last cell.
$('#myid table tbody tr > td:first').remove()
$('#myid table tbody tr > td:last').remove()
Ideas?
Regards<br clear="all">
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Mário Moura