selected = $('.test-lang li'); selected = $('ul.test-lang li'); selected = $('ol.test-lang li'); selected = $('ul:first-child'); selected = $('ul:last-child'); selected = $('ol:last-child');
少写了个li…… selected = $('ul li:first-child');
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姜争辉_十一不哭
selected = $('.test-lang li'); selected = $('ul.test-lang li'); selected = $('ol.test-lang li'); selected = $('ul:first-child'); selected = $('ul:last-child'); selected = $('ol:last-child');