select使用

    <div style="display: flex;">
        <div id="total" style="display: flex;">
            <p>每页数据：</p>
            <select id="MySelect" onchange="OnSelect()">
                <option selected value="10">10</option>
                <option value="50">50</option>
                <option value="200">200</option>
                <option value="500">500</option>
            </select>
        </div>
        <div id="Page">
        </div>
    </div>
    function OnSelect() {
    alert($("#MySelect").val());
    }