Html select、option、optgroup 标签
Html select 标签
</body> </html> <!-- select外部下拉选择框、name="xxx"标识后端获取名称 --> <select name="xxx"> <!-- option内部部下拉选择框包含内容、value="1"标识后端获取值、selected="selected" 默认最先选中 --> <option value="1" selected="selected">1</option> <option value="2">2</option> <option value="3">3</option> </select> <!-- size="10"排列下拉框大小、multiple="multiple"可以按ctrl多选 --> <select name="xxx" size="10" multiple="multiple"> <option value="1" selected="selected">1</option> <option value="2">2</option> <option value="3">3</option> </select> <!-- size="10"排列下拉框大小、multiple="multiple"可以按ctrl多选 --> <select name="xxx" size="10" multiple="multiple"> <option value="1" selected="selected">1</option> <option value="2">2</option> <option value="3">3</option> </select> <select name="xxx" size="10" multiple="multiple"> <!-- optgroup下拉框组标签、label="一"添加不可点击的组名称 --> <optgroup label="一"> <option value="1" selected="selected">1</option> </optgroup> <optgroup label="二"> <option value="2">2</option> </optgroup> </select> </body> </html>
效果