รบกวนหน่อยนะครับ มีปัญหาเรื่องการแสดงผล ครับ ไม่รู้ว่าต้องแก้ไขยังไงครับช่วยหน่อยครับ

<?php
	echo $arrcom['detail'];
?>

<meta http-equiv="Content-Type" content="text/html; charset=windows-874" />
<link href="css/styles.css" rel="stylesheet" type="text/css">
<table width="100%" border="0" cellpadding="5" cellspacing="0" class="box3">
<?
$idtopic=$_GET['idtopic'];
$sql="select * from topic where t_id=$idtopic";
$query=mysql_query($sql);
$arr=mysql_fetch_array($query);

$sqluser="select * from user where id_mem=$id_mem";
$queryuser=mysql_query($sqluser);
$arruser=mysql_fetch_array($queryuser);
?>
<title><?=$arr['title'];?></title>
  <tr>
    <td ><h1><font color="#FFCC00"><?=$arr['title'];?></font></h1></td>
  </tr>
  <tr>
    <td><h3><p><?=$arr['detail'];?></p></h3></td>
  </tr>
  <tr>
    <td>
	<font color="#FFCC66"><b><?
	if($arr['id_mem']==$arruser['id_mem']){
		echo $arruser['username'];
	}?></b></font> - <?=dateTimeDiff($arr['date']);?></td>
  </tr>
</table>
<br>
<?
$sqlcom="select * from comment where t_id=$idtopic order by c_id desc";
$querycom=mysql_query($sqlcom);
while($arrcom=mysql_fetch_array($querycom)){
?>
<table width="100%" border="0" cellpadding="5" cellspacing="0" class="box">
  <tr>
    <td colspan="2"></td>
  </tr>
  <tr>
    <td colspan="2"><p>
    <?
	echo $arrcom['detail'];
	?></p></td>
  </tr>
  <tr>
    <td width="90%">
	<font color="#FFCC00"><b><? if($arrcom['id_mem']==$arruser['id_mem']){
			echo $arruser['username'];
	}
	?></b></font> - <?=dateTimeDiff($arrcom['date']);?></td>
    <td align="right" valign="bottom"><table width="100%" border="0" align="right" cellpadding="1" cellspacing="0">
      <tr>
        <td width="37%" align="right" valign="bottom"><img src="img/toggle-small-expand.png" width="16" height="16" border="0"></td>
        <td width="63%" align="left" valign="top"><a href="#">ตอบกลับ</a></td>
      </tr>
    </table></td>
  </tr>
</table>
<br>
<?
}
?>
<? if($_SESSION){ ?>
<form action="index.php?home=insercomment" method="post" name="form1">
  <table width="100%" border="0" cellpadding="5" cellspacing="0" class="box">
    <tr>
      <td colspan="3">
	  <div>
      <textarea name="detail" cols="150" rows="15" class="tetfilddetail" id="detail" ></textarea>
	  <div id="toolbar">
	  </div>
	  </div>
	  </td>
    </tr>
    <tr>
      <td width="12%"><input type="submit" class="classname" name="Submit" value="แสดงความคิดเห็น"></td>
      <td width="3%"><img src="MyResize/<?=$arruser['File']; ?>" width="31" height="31" border="0" class="pic" /></td>
      <td width="85%"><strong>สมาชิกหมายเลข :</strong> 
      <?=$arruser['id_mem']; ?> | <?=$arruser['username']; ?>
      <input name="id_mem" type="hidden" id="id_mem" value="<?=$arruser['id_mem']; ?>">
      <input name="t_id" type="hidden" id="t_id" value="<?=$idtopic;?>"></td>
    </tr>
  </table>
</form>
<?
}
?>

<meta http-equiv="Content-Type" content="text/html; charset=windows-874" />
<?
$detail=$_POST['detail'];
$date=date("Y-m-d H:i:s");
$id_mem=$_POST['id_mem'];
$t_id=$_POST['t_id'];

$sqlpost= "insert into comment values('','$detail','$date','$id_mem','$t_id')";
if(mysql_query($sqlpost)){
			echo "<script>alert('แสดงความคิดเห็นเสร็จสิ้นสมบูรณ์');window.location='index.php?home=detail_from&idtopic=$t_id';</script>";
}else{
			echo "<script>alert('ไม่สามารถแสดงความคิดเห็นได้!!!');history.back();</script>";
}
?>

<?
$idtopic=$_GET['idtopic'];
$sql="select * from topic where t_id='".$idTopic."'";
$query=mysql_query($sql);
$arr=mysql_fetch_array($query);

$sqluser="select * from user where id_mem=$id_mem";
$queryuser=mysql_query($sqluser);
$arruser=mysql_fetch_array($queryuser);
?>
<title><?=$arr['title'];?></title>
  <tr>
    <td ><h1><font color="#FFCC00"><?=$arr['title'];?></font></h1></td>
  </tr>
  <tr>
    <td><h3><p><?=$arr['detail'];?></p></h3></td>
  </tr>
  <tr>
    <td>
	<font color="#FFCC66"><b><?
	if($arr['id_mem']==$arruser['id_mem']){
		echo $arruser['username'];
	}?></b></font> - <?=dateTimeDiff($arr['date']);?></td>
  </tr>
</table>
<br>
<?
$sqlcom="select * from comment where t_id='".$idTopic."' order by c_id desc";
$querycom=mysql_query($sqlcom);
while($arrcom=mysql_fetch_array($querycom)){
?>
<table width="100%" border="0" cellpadding="5" cellspacing="0" class="box">
  <tr>
    <td colspan="2"></td>
  </tr>
  <tr>
    <td colspan="2"><p>
    <?
	echo $arrcom['detail'];
	?></p></td>
  </tr>
  <tr>
    <td width="90%">
	<font color="#FFCC00"><b><? if($arrcom['id_mem']==$arruser['id_mem']){
			echo $arruser['username'];
	}
	?></b></font> - <?=dateTimeDiff($arrcom['date']);?></td>
    <td align="right" valign="bottom"><table width="100%" border="0" align="right" cellpadding="1" cellspacing="0">
      <tr>
        <td width="37%" align="right" valign="bottom"><img src="img/toggle-small-expand.png" width="16" height="16" border="0"></td>
        <td width="63%" align="left" valign="top"><a href="#">ตอบกลับ</a></td>
      </tr>
    </table></td>
  </tr>
</table>
<br>
<?
}
?>

https://www.thaicreate.com/php/forum/071001.html