JS

代码：

<td style="padding-left: 10px;">
    <select  id="ddl_picture_3">
        <!--循环添加1-600-->
        <script>
            for (var i = 100; i <= 700; i++) {
                document.write("<option value= r" + i + "'>" + i + "</option>");
            }
        </script>
    </select>
</td>