我想自动提交或自动刷新我还不确定，因为我有点困惑。
我有三个下拉列表。我们从数据库中选择前两个下拉列表从数据库中选择团队A和团队B，第三个下拉列表是显示团队A和团队B - 这是我失去它的地方。当我不提交表格时如何查看？
这是我的html代码。
<form action="addmatch.php" method="post" >
<div class="match-form" >
<div class="match-row">
<label>
<a>Date</a>
<input type="date" name="matchdate" style="margin-left:-8px;" required>
</label>
</div>
<div class="match-row">
<label>
<a>Time</a>
<input type="time" name="matchtime" style="margin-left:-8px;" required>
</label>
</div>
<div class="match-row">
<label>
<a>Category</a>
<select name="category" size="1" style="margin-left:-30px;" required>
<option>select</option>
<?php
if($stmt=$conn->query("select * from categorymatch"))
{ while($r=$stmt->fetch_array(MYSQLI_ASSOC))
{ ?>
<option value=<?php echo $r['categoryId'] ?>><?php echo $r['categoryName'] ?></option>
<?php } } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Team A </a>
<select name="teamA" size="1" style="margin-left:-24px;" onchange="submit" required>
<option>select</option>
<?php
if($stm=$conn->query("select TEAMLISTID, TEAMLISTNAME from teamlist"))
{ while($s=$stm->fetch_array(MYSQLI_ASSOC))
{ ?>
<option value=<?php echo $s['TEAMLISTID'] ?>><?php echo $s['TEAMLISTNAME'] ?></option>
<?php } } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Team B </a>
<select name="teamB" size="1" style="margin-left:-24px;" onchange="submit" required>
<option>select</option>
<?php
if($stm=$conn->query("select TEAMLISTID, TEAMLISTNAME from teamlist"))
{ while($s=$stm->fetch_array(MYSQLI_ASSOC))
{ ?>
<option value=<?php echo $s['TEAMLISTID'] ?>><?php echo $s['TEAMLISTNAME'] ?></option>
<?php } } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Handicap </a>
<select name="handicap" size="1" style="margin-left:-33px;" required>
<option>select</option>
<option>1:0</option>
<option>3/4:0</option>
<option>1/2:0</option>
<option>1/4:0</option>
<option>0:0</option>
<option>0:1/4</option>
<option>0:1/2</option>
<option>0:3/4</option>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Status Match </a>
<select name="statusmatch" size="1" style="margin-left:-57px;" required>
<option>select</option>
<?php
if($st=$conn->query("select * from statusmatch"))
{ while($a=$st->fetch_array(MYSQLI_ASSOC))
{ ?>
<option value=<?php echo $a['statusmatchId'] ?>><?php echo $a['statusmatchName'] ?></option>
<?php } } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Tip Type </a>
<select name="tiptype" size="1" style="margin-left:-30px;" required>
<option>select</option>
<?php
if($stt=$conn->query("select * from tiptype"))
{ while($b=$stt->fetch_array(MYSQLI_ASSOC))
{ ?>
<option value=<?php echo $b['tiptypeId'] ?>><?php echo $b['tiptypeName'] ?></option>
<?php } } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Tip </a>
<select name="tip" size="1" required>
<option>select</option>
<?php
if($stm=$conn->query("select teamA, teamb from matchlist"))
{ ?>
<option value=<?php ?>><?php echo $s['teamA'] ?></option>
<option value=<?php ?>><?php echo $s['teamb'] ?></option>
<?php } ?>
</select>
</label>
</div>
<div class="match-row">
<label>
<a>Score </a>
<input type="text" name="scoreteam" style="margin-left:-15px;">
</label>
</div>
<div class="match-row">
<label>
<a>Result </a>
<select name="result" size="1" style="margin-left:-19px;">
<option>select</option>
<option>Win</option>
<option>Loss</option>
<option>Draw</option>
</select>
</label>
</div>
<input type="submit" id="someText" value="Submit" style="margin-left:200px; margin-top:30px; margin-bottom:20px; padding:10px;">
</div>
</form>
谢谢！