问为什么Javascript函数只有在php登录会话处于活动状态时才起作用，而在注销时却停止工作？

EN

function closeFilm(){
 document.getElementById("film").classList.remove("show");
}


function showFilm() {
	  document.getElementById("film").classList.toggle("show");
}

<div class="dropdown">
<button onclick="closeAdmin();closeSocial(); closeRicerca(); showFilm(); closeCinema();   closeLogin(); "  class="dropbtn">Film</button>
  <div id="film" class="dropdown-content">
    <a href="pages/film.html" target="framecontent">Film</a>
    <a href="pages/attore.html" target="framecontent">Attori</a>
    <a href="pages/articolo.html" target="framecontent">News</a>
    <a href="pages/premi.html" target="framecontent">Premi</a>
  </div>
</div>