How can I visit a selected link from drop-down list on external button in a new window?
I am supposing here you want select the site and want to open that site after click on downlad button.
HTML
JS
var button = document.getElementById("myButton");
button.addEventListener("click", function() {
var select = document.getElementById('select');
var win = window.open(select.options[select.selectedIndex].value, "_blank");
win.focus();
},false);
DEMO