jQuery <ul> select <li> by filter callback function
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Filtering the Selection of Elements in jQuery via Function</title> <style> .highlight{// w w w . ja v a 2 s. c om background: yellow; } </style> <script src="https://code.jquery.com/jquery-1.12.4.min.js"></script> <script> $(document).ready(function(){ $("ul li").filter(function(index){ return index % 2 !== 0; }).addClass("highlight"); }); </script> </head> <body> <h2>Unordered List</h2> <ul> <li>First list item</li> <li>Second list item</li> <li>Third list item</li> <li>Fourth list item</li> </ul> <hr> <h2>Another Unordered List</h2> <ul> <li>First list item</li> <li>Second list item</li> <li>Third list item</li> <li>Fourth list item</li> </ul> </body> </html>