Javascript does not find element by id

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Apparently Javascript is not seeing the ID that I want to change its value. I’ve checked all the code and I can’t find the error.

  function SubMenu_EXIBE_OCULTA(menu){
    var obj=document.getElementById("menu");
      if(obj.style.display == 'block'){
        obj.style.display = 'none';
      } else {obj.style.display = 'block';}                
  }
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a, .Menu_Principal_ITENS {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover, .dropdown:hover .Menu_Principal_ITENS {
    background-color: red;
}

li.dropdown {
    display: inline-block;
}

#SubMenus_MONTAGEM {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

#SubMenus_MONTAGEM a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    /* text-align: center; */
    text-align: left;
}

#SubMenus_MONTAGEM a:hover {background-color: #f1f1f1}


.CSS_Exibe_Oculta {display:block;}
<!DOCTYPE html>
<html>
<head>
</head>
<body>

<ul>
  
  <li><a href="#home">Home</a></li>                                                         <!-- <li><a class="active" href="#home">Home</a></li> -->
  <li><a href="#news">News</a></li>
  <li class="dropdown">
    <a href="javascript:void(0)" class="Menu_Principal_ITENS" onclick="SubMenu_EXIBE_OCULTA('SubMenus_MONTAGEM')">Clique-me</a>
    <div id="SubMenus_MONTAGEM">
      <a href="#">Link 1</a>
      <a href="#">Link 2</a>
      <a href="#">Link 3</a>
    </div>    
  </li>
</ul>

</body>
</html>

javascript

1 answer

2


Actually you are looking for a nonexistent id in your HTML looking for a string and not the variable received in the method.

var obj=document.getElementById("menu");

Try it like this:

 function SubMenu_EXIBE_OCULTA(menu){
    var obj=document.getElementById(menu);
      if(obj.style.display == 'block'){
        obj.style.display = 'none';
      } else {obj.style.display = 'block';}                
  }

  • 1

    Victor, had just found the error, then came here quickly to delete or answer if anyone had answered. Anyway, thank you very much and a strong hug.

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