Display div if a specific select option value is s

Question

I am trying to display a div if user select a specific option value from a select drop down list.

Example:

The select drop down list consist of dynamic names fetched from the database and also one static or permanent name at the bottom of the list called "Admin"

If user select an option that's not "Admin", a div containing certain form element is shown else if the user select "Admin" that div remain hidden

Here is my code:

Javascript -

<script language="javascript">

function admSelectCheck(nameSelect)
{
    if(nameSelect){
        admOptionValue = document.getElementById("admOption").value;
        if(admOptionValue != 0){
            document.getElementById("admDivCheck").style.display = "";
        }
        else{
            document.getElementById("admDivCheck").style.display = "none";
        }
    }
    else{
        document.getElementById("admDivCheck").style.display = "none";
    }
}

</script>

HTML -

<select id="getFname" onchange="admSelectCheck(this.select);">
<option value="1">Jay</option>
<option value="4">Sam</option>
<option id="admOption" value="0">Admin</option>
</select>


<div id="admDivCheck" style="display:none;">
admin selected
</div>

Would be glad getting help with this.

Answer 1

Try

<select id="getFname" onchange="admSelectCheck(this);">
    <option value="1">Jay</option>
    <option value="4">Sam</option>
    <option id="admOption" value="0">Admin</option>
</select>


<div id="admDivCheck" style="display:none;">
    admin selected
</div>

And

function admSelectCheck(nameSelect)
{
    var val = nameSelect.options[nameSelect.selectedIndex].value;
    document.getElementById("admDivCheck").style.display = val == '0' ? "block" : 'none';
}

Demo: Fiddle