如何无限扩充?
以
<select name="select" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
为模板
要求按钮按一次就可以增加一个即变成两个
<select name="select1" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select2" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
再点击一次变成
<select name="select1" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select2" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select3" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
或者同时增加3个
即点击按钮一次变成
<select name="select11" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select12" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select13" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
再点击一次变成
<select name="select11" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select12" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select13" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select21" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select22" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select name="select23" size="1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>