이미지의 Height값을 받아오는 중 문제가 생겨서 질문드립니다. 채택완료

$img2 = "$g4[path]/data/file/$bo_table/".urlencode($list[$i][file][1][file]);

$size = getimagesize($img2);

<table  width="800"  border="0" cellpadding="0" cellspacing="0" align="center" >

	<tr>

		<td width="800" height="<?= $size[1] ?>" 
Style="background:#fff;"><img 
src="<?=$list[0][file][0][path]?>/<?=$list[0][file][1][file]?>"
 width="800" height="<?= $size[1] ?>" id="main_img"></td>

	</tr>

<pre><?
for ($i=0; $i<count($list); $i++) 
{ 
 $title = "자세히보기";
 $content = cut_str(get_text($list[$i][wr_content]), 180);
	$subject = cut_str(get_text($list[$i][subject]), 100, '...');
	$img_width = '160';		// 이미지 개당 가로크기 
	$img_height = '120';		// 이미지 개당 세로크기 

 $img = "$g4[path]/data/file/$bo_table/".urlencode($list[$i][file][0][file]);
 $img2 = "$g4[path]/data/file/$bo_table/".urlencode($list[$i][file][1][file]);
	$size = getimagesize($img2);
 if (!file_exists($img) || !$list[$i][file][0][file])
 $img = "$board_skin_path/img/no_image.gif";

 if ($is_admin) 
 $view_href = "$g4[bbs_path]/board.php?bo_table=$bo_table&wr_id={$list[$i][wr_id]}";
	else 
		$view_href = "#";

 $checkbox = "";
 if ($is_checkbox)
 $checkbox = "<input type=checkbox name=chk_wr_id[] value='{$list[$i][wr_id]}'>";

 $tr = ""; 
 if ($i && $i%$board[bo_gallery_cols]==0) 
 $tr = "</tr><tr>"; 
 echo "$tr"; 

 echo <<<HEREDOC
 <td width="{$td_width}%" valign="top" align="center" >
<table width="200" height="100" border="0" cellpadding="0" cellspacing="0">
	<tr>
		<td align="center">
			<img src="{$img}" width='{$img_width}' height='{$img_height}' border="0" title="$title" style="border:0px solid #000000;cursor:pointer;" onClick="view_img('$img2')">
		</td>
	</tr>
	<tr>
		<td align="center" onClick="view_img('$img2')" style="cursor:pointer;">{$checkbox} {$subject}</td>
	</tr>
</table>

 </td>
HEREDOC;
}

// 나머지 td 를 채운다.

if ($i == 0)
 echo "<td colspan='$board[bo_gallery_cols]' height=50 align=center>게시물이 없습니다.</td>";
?>

<!-- 게시판 목록 시작 -->
<table width="<?=$width?>" border="0" align="center" cellpadding="0" cellspacing="0"><tr><td>
<table  width="800"  border="0" cellpadding="0" cellspacing="0" align="center" >
	<tr>
		<td width="800" height="<?= $size[1] ?>" Style="background:#fff;"><img src="<?=$list[0][file][0][path]?>/<?=$list[0][file][1][file]?>" width="800" height="<?= $size[1] ?>" id="main_img"></td>
	</tr>
</table>

<script language="JavaScript">
function view_img(img2){
	document.getElementById("main_img").src = img2;
}

</script>