改变奇数行颜色

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="js/jquery-1.8.3.js"></script>
        <script>
            $(document).ready(function(e){
                $("h2").click(function(){
                    $("ul li:odd").css("background","#ffe773");
                });
            });
        </script>
    </head>
    <body>
        <div>
            <h2>用户交互设计学习参考</h2>
            <ul>
                <li>JavaScript DOM编程</li>
                <li>锋利的jQuery</li>
                <li>jQuery入门与提高</li>
                <li>JavaScript 高级编程</li>
                <li>jQuery权威指南</li>
                <li>jQuery实战</li>
            </ul>
        </div>
    </body>
</html>