JS——select标签

<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <title></title>

</head>

<body>

    <button id="btn">寻找不同</button>

    <select id="sel">

        <option value="0">香蕉</option>

        <option value="1">苹果</option>

        <option value="2">梨子</option>

        <option value="3">鳄鱼</option>

    </select>

    <script>

        var sel = document.getElementById("sel");

        var btn = document.getElementById("btn");

        btn.onclick = function () {

            var opt = sel.getElementsByTagName("option")[3];

            opt.selected = true;

        }

    </script>

</body>

</html>

巴特西

JS——select标签

最新文章

热门文章