Bootply (http://bootply.com/98907)
with the chrome/mobile view (small width view), Height of "Auth" checkbox changed to high.
height of Auth checkbox must be same.
<form name="fhead" class="form-inline" role="form" onsubmit="return fhead_submit(this);" method="post" autocomplete="off">
<div id="outlogin_box" name="outlogin_box">
<input name="url" type="hidden" value="%2F">
<input name="mb_id" class="form-control" type="text" maxlength="20" placeholder="login id" itemname="아이디">
<div class="input-group">
<input name="mb_password" class="form-control" id="outlogin_mb_password" type="password" maxlength="20" placeholder="password" itemname="password">
<span class="input-group-addon">
<div class="checkbox">
<label>
<input name="auto_login" title="Remember me" onclick="if (this.checked) { if (confirm('Using Auth?')) { this.checked = true; } else { this.checked = false; } }" type="checkbox" value="1">
Auth
</label>
</div>
</span>
</div>
<button class="btn btn-default btn-group-justified" type="submit">Login</button>
<div class="input-group">
<div class="btn-group btn-group-justified">
<a title="회원가입" class="btn btn-default" href="./bbs/register.php">회원가입</a>
<a title="회원 id, password 찾기" class="btn btn-default" href="javascript:win_password_lost();">아이디찾기</a>
</div>
</div>
</div>
</form>