Javascript code that DISPLAYS the radio button value in a text box that also checks for the drop down value and displays a certain array value depending on the radio value choosen for the drop down se

function Dropcity() {

var select = document.getElementById('dropcity');

var option = select.options[select.selectedIndex];

document.getElementById('displaycity').value = option.value;

document.getElementById('value').value = option.text;

/* function below is the if/else statement section*/

function Popnums()

var checked_year = document.querySelector('input[name="year"]:checked');

if(checked_year != null){

document.getElementById('pop_num').value==option.value;

} else {

document.forms[0].elements['year'].value;

}