안녕하세요 현제 모바일에서 왼족에 메뉴를 만들고 있는데요 서브메뉴가 안나타나는 현상이 있어서 이렇게 여쭤보게 됩니다.

고수님들의 답변 부탁 드립니다.

http://jmt5.co.kr/test/index.php?device=mobile

여기로 들어가시면 사이트가 하나 나오는데요

여기서 상단 메뉴 버튼을 누르게 되면 메뉴가 나오는데 거기서 회사소개 부분을 클릭을 하면 메뉴가 나오지는 안아요 밑으로 떨어지는 엑션은 취해지고 있는 것 같은데요 뭐가 잘 못 되었을까요

아래는 메뉴 소스 입니다.

<div class="ui-panel ui-panel-position-left ui-panel-display-overlay ui-body-b ui-panel-animate ui-panel-open"
 id="leftpanel3"
 data-role="panel"
 data-theme="b"
 data-display="overlay"
 data-position="left">
 <div class="ui-panel-inner"><div class="ui-shadow ui-corner-all " data-inset="false">
  <h3>메뉴관리</h3>
  <ul class="ui-listview" data-role="listview">
   <li class="ui-collapsible ui-collapsible-inset ui-corner-all ui-collapsible-themed-content ui-li-static ui-body-inherit ui-first-child ui-collapsible-collapsed" style="padding: 0px; border: 0px currentColor; border-image: none; width: 100%;" data-role="collapsible" data-iconpos="right">
   <h3 class="ui-collapsible-heading ui-collapsible-heading-collapsed" style="margin: 0px; padding: 0px; border: 0px currentColor; border-image: none;">
   <a class="ui-collapsible-heading-toggle ui-btn ui-btn-icon-right ui-btn-inherit ui-icon-plus" href="#">회사소개
   <span class="ui-collapsible-heading-status"> click to expand contents</span></a></h3>
    <div class="ui-collapsible-content ui-body-inherit ui-collapsible-content-collapsed" aria-hidden="true">
     <ul class="ui-listview ui-listview-inset ui-corner-all ui-shadow" style="margin: 0px; padding: 0px; border: 0px currentColor; border-image: none; width: 100%;" data-role="listview" data-inset="true">
      <li class="ui-first-child" style="margin: 0px; padding: 0px;"><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5562&yp=5562&tu=1&mobile_chk=1&sNum=10" rel="external">인사말 </a></li>
      <li class="ui-last-child" style="margin: 0px; padding: 0px;"><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5563&yp=5563&tu=1&mobile_chk=1&sNum=10" rel="external">오시는길 </a></li>
     </ul>
    </div>
   </li>
   <li><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5376&yp=5376&mobile_chk=1&tu=1&mNum=10" rel="external">서비스안내</a></li>
   <li><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5378&yp=5378&mobile_chk=1&tu=1&mNum=10" rel="external">포토갤러리</a></li>
   <li><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5379&yp=5379&mobile_chk=1&direct_write=1&tu=1&mNum=10" rel="external">온라인문의</a></li>
   <li class="ui-last-child"><a class="ui-btn ui-btn-icon-right ui-icon-carat-r" href="/index.html?skin_mode=page&xp=5380&yp=5380&mobile_chk=1&tu=1&mNum=10" rel="external">공지사항</a></li>
  </ul>
 </div><a class="ui-btn ui-shadow ui-corner-all ui-btn-a ui-icon-forbidden ui-btn-icon-left ui-btn-inline" href="#demo-links" data-rel="close">창닫기</a></div>
 
</div>