在输入两列的值后自动写入第三列?
<td align="left"><?php echo "Address:"; ?>
<input class="inputbox" type="text" name="address" id="address" size="20" maxlength="20" value="<?php echo $row->address; ?>" />
</td>
<td align="left"><?php echo "room:"; ?>
<input class="inputbox" type="text" name="room" id="address" size="20" maxlength="20" value="<?php echo $row->room; ?>" />
</td>
我想在把address和room通过表单输入mysql数据库的address列和room列的时候,在同一个表的列text中自动写入address的值和room的值。该怎么写呢?