I used a combination of previous answer to add tr's with display=none programatically:
HTML
| A |
B |
C |
| 1 |
2 |
sub C 1 |
| sub C 2 |
| 3 |
4 |
5 |
| 6 |
7 |
8 |
CSS
table tr:nth-child(2n) {
background-color: #F8ECE0;
}
JQUERY
$( "
" ).insertAfter('tbody tr:has(td[rowspan])');
See the JSfiddle.