jQuery :odd Selector
Select every other (odd) <tr> element:
Definition and Usage
The :odd selector selects each element with an odd index number (like: 1, 3, 5, etc.).
The index numbers start at 0.
This is mostly used together with another selector to select every odd indexed element in a group (like in the example above).
Tip: Use the :even selector to select elements with even index numbers.