리스트 tr_bg 클래스 처리 코드 간소화

adm/mail_list.php

@@ -57,10 +57,10 @@ $colspan = 7;
 
         $num = number_format($total_count - ($page - 1) * $config['cf_page_rows'] - $i);
 
-        $tr_bg = $i%2 ? 'class="tr_bg1"' : 'class="tr_bg0"';
+        $tr_bg = 'tr_bg'.($i%2);
     ?>
 
-    <tr<?php echo ' '.$tr_bg; ?>>
+    <tr class="<?php echo $tr_bg; ?>">
         <td class="td_chk">
             <input type="checkbox" id="chk_<?php echo $i ?>" name="chk[]" value="<?php echo $row['ma_id'] ?>" title="메일선택">
         </td>