For Giorgio

For Giorgio

by Ludolfyn

HTML

<select name="" id="catid">
    <option value="" selected diabled>Select an option</option>
    <option value="20">Option 1 (Val 20)</option>
    <option value="30">Option 2 (Val 30)</option>
    <option value="37">Option 3 (Val 37)</option>
    <option value="40">Option 4 (Val 40)</option>
    <option value="50">Option 5 (Val 50)</option>
    <option value="60">Option 6 (Val 60)</option>
</select>

JavaScript

$(document).ready(function() {

    //$('#catid').on('change', function() {
        $('#catid option').each(function() {
            if ($(this).val() === '37') {
               $(this).show()
            } else {
                $(this).hide()
            }
        })
    //})

})