jQuery :odd Selector
Select every other (odd) <tr> element:
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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.