diff --git a/adm/member_form.php b/adm/member_form.php
index 1cd07d5af..10e17f07a 100644
--- a/adm/member_form.php
+++ b/adm/member_form.php
@@ -9,7 +9,7 @@ $token = get_token();
 if ($w == '')
 {
     $required_mb_id = 'required';
-    $required_mb_id_class = 'required minlength=3 alnum_';
+    $required_mb_id_class = 'required alnum_';
     $required_mb_password = 'required';
     $sound_only = '<strong class="sound_only">필수</strong>';
 
@@ -154,7 +154,7 @@ include_once('./admin.head.php');
     <tr>
         <th scope="row"><label for="mb_id">아이디<?php echo $sound_only ?></label></th>
         <td>
-            <input type="text" name="mb_id" value="<?php echo $mb['mb_id'] ?>" id="mb_id" <?php echo $required_mb_id ?> class="frm_input <?php echo $required_mb_id_class ?>" size="15" maxlength="20" >
+            <input type="text" name="mb_id" value="<?php echo $mb['mb_id'] ?>" id="mb_id" <?php echo $required_mb_id ?> class="frm_input <?php echo $required_mb_id_class ?>" size="15" minlength="3" maxlength="20">
             <?php if ($w=='u'){ ?><a href="./boardgroupmember_form.php?mb_id=<?php echo $mb['mb_id'] ?>">접근가능그룹보기</a><?php } ?>
         </td>
         <th scope="row"><label for="mb_password">비밀번호<?php echo $sound_only ?></label></th>
@@ -162,9 +162,9 @@ include_once('./admin.head.php');
     </tr>
     <tr>
         <th scope="row"><label for="mb_name">이름(실명)<strong class="sound_only">필수</strong></label></th>
-        <td><input type="text" name="mb_name" value="<?php echo $mb['mb_name'] ?>" id="mb_name" required class="required frm_input minlength=2" size="15" maxlength="20"></td>
+        <td><input type="text" name="mb_name" value="<?php echo $mb['mb_name'] ?>" id="mb_name" required class="required frm_input" size="15" minlength="2" maxlength="20"></td>
         <th scope="row"><label for="mb_nick">닉네임<strong class="sound_only">필수</strong></label></th>
-        <td><input type="text" name="mb_nick" value="<?php echo $mb['mb_nick'] ?>" id="mb_nick" required class="required frm_input minlength=2" size="15" maxlength="20"></td>
+        <td><input type="text" name="mb_nick" value="<?php echo $mb['mb_nick'] ?>" id="mb_nick" required class="required frm_input" size="15" minlength="2" maxlength="20"></td>
     </tr>
     <tr>
         <th scope="row"><label for="mb_level">회원 권한</label></th>
diff --git a/js/wrest.js b/js/wrest.js
index e3ce98f7f..1b9c8db3a 100644
--- a/js/wrest.js
+++ b/js/wrest.js
@@ -204,15 +204,15 @@ function wrestAlNum_(fld)
 }
 
 // 최소 길이 검사
-function wrestMinLength(fld, css)
+function wrestMinLength(fld)
 {
     if (!wrestTrim(fld)) return;
 
-    var str = css.split('='); // minlength=?? <-- str[1]
+    var minlength = fld.getAttribute("minlength");
 
     if (wrestFld == null) {
-        if (fld.value.length < parseInt(str[1])) {
-            wrestMsg = wrestItemname(fld) + " : 최소 "+str[1]+"글자 이상 입력하세요.\n";
+        if (fld.value.length < parseInt(minlength)) {
+            wrestMsg = wrestItemname(fld) + " : 최소 "+minlength+"글자 이상 입력하세요.\n";
             wrestFld = fld;
         }
     }
@@ -282,6 +282,10 @@ function wrestSubmit()
                 wrestRequired(el);
             }
 
+            if (el.getAttribute("minlength") != null) {
+                wrestMinLength(el);
+            }
+
             var array_css = el.className.split(" "); // class 를 공백으로 나눔
 
             el.style.backgroundColor = wrestFldDefaultColor;
@@ -305,10 +309,7 @@ function wrestSubmit()
                     case "telnum"       : wrestTelNum(el); break; // 김선용 2006.3 - 전화번호 형식 검사
                     case "imgext"       : wrestImgExt(el); break;
                     default :
-                        // css 가 minlength= 로 시작한다면 = 뒤의 숫자는 최소길이값
-                        if (/^minlength\=/.test(css)) {
-                            wrestMinLength(el, css); break;
-                        } else if (/^extension\=/.test(css)) {
+                        if (/^extension\=/.test(css)) {
                             wrestExtension(el, css); break;
                         }
                 } // switch (css)
diff --git a/mobile/skin/member/basic/register_form.skin.php b/mobile/skin/member/basic/register_form.skin.php
index 8ba1e5a5a..8cf96a119 100644
--- a/mobile/skin/member/basic/register_form.skin.php
+++ b/mobile/skin/member/basic/register_form.skin.php
@@ -32,17 +32,17 @@ $juso_addr3_view = $member['mb_addr_jibeon'] == 'N' ? 'style="display:none"' : '
             <th scope="row"><label for="reg_mb_id">아이디<strong class="sound_only">필수</strong></label></th>
             <td>
                 <span class="frm_info">영문자, 숫자, _ 만 입력 가능. 최소 3자이상 입력하세요.</span>
-                <input type="text" name="mb_id" value="<?php echo $member['mb_id'] ?>" id="reg_mb_id" class="frm_input minlength=3 <?php echo $required ?> <?php echo $readonly ?>" minlength="3" maxlength="20" <?php echo $required ?> <?php echo $readonly ?>>
+                <input type="text" name="mb_id" value="<?php echo $member['mb_id'] ?>" id="reg_mb_id" class="frm_input <?php echo $required ?> <?php echo $readonly ?>" minlength="3" maxlength="20" <?php echo $required ?> <?php echo $readonly ?>>
                 <span id="msg_mb_id"></span>
             </td>
         </tr>
         <tr>
             <th scope="row"><label for="reg_mb_password">비밀번호<strong class="sound_only">필수</strong></label></th>
-            <td><input type="password" name="mb_password" id="reg_mb_password" class="frm_input minlength=3 <?php echo $required ?>" minlength="3" maxlength="20" <?php echo $required ?>></td>
+            <td><input type="password" name="mb_password" id="reg_mb_password" class="frm_input <?php echo $required ?>" minlength="3" maxlength="20" <?php echo $required ?>></td>
         </tr>
         <tr>
             <th scope="row"><label for="reg_mb_password_re">비밀번호 확인<strong class="sound_only">필수</strong></label></th>
-            <td><input type="password" name="mb_password_re" id="reg_mb_password_re" class="frm_input minlength=3 <?php echo $required ?>" minlength="3" maxlength="20" <?php echo $required ?>></td>
+            <td><input type="password" name="mb_password_re" id="reg_mb_password_re" class="frm_input <?php echo $required ?>" minlength="3" maxlength="20" <?php echo $required ?>></td>
         </tr>
         </table>
     </div>
diff --git a/skin/member/basic/register_form.skin.php b/skin/member/basic/register_form.skin.php
index 5cc06bbfb..b4b1bd236 100644
--- a/skin/member/basic/register_form.skin.php
+++ b/skin/member/basic/register_form.skin.php
@@ -35,17 +35,17 @@ $juso_addr3_view = $member['mb_addr_jibeon'] == 'N' ? 'style="display:none"' : '
             <th scope="row"><label for="reg_mb_id">아이디<strong class="sound_only">필수</strong></label></th>
             <td>
                 <span class="frm_info">영문자, 숫자, _ 만 입력 가능. 최소 3자이상 입력하세요.</span>
-                <input type="text" name="mb_id" value="<?php echo $member['mb_id'] ?>" id="reg_mb_id" <?php echo $required ?> <?php echo $readonly ?> class="frm_input minlength=3 <?php echo $required ?> <?php echo $readonly ?>" minlength="3" maxlength="20">
+                <input type="text" name="mb_id" value="<?php echo $member['mb_id'] ?>" id="reg_mb_id" <?php echo $required ?> <?php echo $readonly ?> class="frm_input <?php echo $required ?> <?php echo $readonly ?>" minlength="3" maxlength="20">
                 <span id="msg_mb_id"></span>
             </td>
         </tr>
         <tr>
             <th scope="row"><label for="reg_mb_password">비밀번호<strong class="sound_only">필수</strong></label></th>
-            <td><input type="password" name="mb_password" id="reg_mb_password" <?php echo $required ?> class="frm_input minlength=3 <?php echo $required ?>" minlength="3" maxlength="20"></td>
+            <td><input type="password" name="mb_password" id="reg_mb_password" <?php echo $required ?> class="frm_input <?php echo $required ?>" minlength="3" maxlength="20"></td>
         </tr>
         <tr>
             <th scope="row"><label for="reg_mb_password_re">비밀번호 확인<strong class="sound_only">필수</strong></label></th>
-            <td><input type="password" name="mb_password_re" id="reg_mb_password_re" <?php echo $required ?> class="frm_input minlength=3 <?php echo $required ?>" minlength="3" maxlength="20"></td>
+            <td><input type="password" name="mb_password_re" id="reg_mb_password_re" <?php echo $required ?> class="frm_input <?php echo $required ?>" minlength="3" maxlength="20"></td>
         </tr>
         </tbody>
         </table>