var selectElem = document.createElement("select");
var selectElem2 = document.createElement("select");

var newOption = document.createElement("option");
newOption.value = "hello";
newOptionText = document.createTextNode("Test");
newOption.appendChild(newOptionText);

var newOption2 = newOption.cloneNode(true);

selectElem.appendChild(newOption);
selectElem2.appendChild(newOption2);