Something like this could work:
| Column1 | Column2 |
| Column1 | Column2 |
| Start | Hiding |
| Column1 | Column2 |
| Column1 | Column2 |
| Column1 | Column2 |
| End | Hiding |
| Column1 | Column2 |
| Column1 | Column2 |
$('#something').click( function() {
$('.Table_Middle').hide();
$('.Show_Rows').show();
});
$('.Show_Rows').click( function() {
$('.Show_Rows').hide();
$('.Table_Middle').show();
});