jQuery :evenSelector
Definition and Usage
The :even selector selects each element with an even index number (such as: 0, 2, 4, etc.).
Index values start at 0; the first element is even (0), the second element is odd (1), and so on.
Most common usage: used together with other selectors to select every even-indexed element in a specified combination (as in the example above).
Tip:Please use the:oddselector to select elements with odd index numbers.
Syntax
$(":even")
Other extensions
jQuery Selector