‎مجموعه گزينه هاي شئSelect

var x = document.getElementById("mySelect").options.length;

‎توجه ـ عناصر موجود در مجموعه ، همانوريكه در كد منبع تعريف شده اند، ظاهر ميشوند.

var x = document.getElementById("mySelect").options[0].text;

var x = document.getElementById("mySelect").options.item(0).text;

‎دومتد فوق داراي دو فرمت مختلف ولي داراي عملكرد مشابه

var x = document.getElementById("mySelect").options.namedItem("orange").text;

var x = document.getElementById("mySelect");
var c = document.createElement("option");
c.text = "Kiwi";
x.options.add(c, 1);

var x = document.getElementById("mySelect");
x.options.remove(1);

var x = document.getElementById("mySelect");
var txt = "";
var i;
for (i = 0; i < x.length; i++) {
  txt = txt + x.options[i].text + "<br>";
}

Apple
Orange
Pineapple
Banana

var x = document.getElementById("mySelect");
var i = x.selectedIndex;
document.getElementById("demo").innerHTML = x.options[i].text;

var carsAndModels = {};
carsAndModels['VO'] = ['V70', 'XC60', 'XC90'];
carsAndModels['VW'] = ['Golf', 'Polo', 'Scirocco', 'Touareg'];
carsAndModels['BMW'] = ['M6', 'X5', 'Z3'];

function ChangeCarList() {
  var carList = document.getElementById("car");
  var modelList = document.getElementById("carmodel");
  var selCar = carList.options[carList.selectedIndex].value;

  while (modelList.options.length) {
    modelList.remove(0);
  }

  var cars = carsAndModels[selCar];
  if  (cars) {
    var i;
    for (i = 0; i < cars.length; i++) {
      var car = new Option(cars[i], i);
      modelList.options.add(car);
    }
  }
}