https://example.com/style.css X

body { text-align:center; } iframe { display:block; margin:10px auto; width:540px; height:500px; }

https://example.com/script.js X

$('button').click(function() { $('iframe').attr('src', $('input').val()); }); $('select').change(function() { $('iframe').css('width', $(this).val() + 'px'); });

<select> <option value="540">540</option> <option value="600">600</option> <option value="1024">1024</option> <option value="1350">1350</option> </select> <input type="text" value="https://"><button>Cek Responsibilitas</button> <iframe></iframe>