Issue JavaScript

function countriesSelected(){
    document.getElementById("countriesSelected").innerHTML =  "USA";
}

function toggleUSA(){
    document.getElementById("countriesSelected").innerHTML =  "USA";

}



function createEventListeners() {
    // sets all form field values to defaults
 document.getElementById("USA").addEventListener("change", countriesSelected,false);
 document.getElementById("Venezuela").addEventListener("change", toggleVenezuela, false);
 document.getElementById("Romania"). addEventListener("change", toggleRomania, false);

}

createEventListeners()