Show input field only if a specific option is selected

Answer 1

    function yesnoCheck(that) {
        if (that.value == "other") {
            document.getElementById("ifYes").style.display = "block";
        }elseif (that.value == "lada") {
            
} else {
            document.getElementById("ifYes").style.display = "none";
        }
    }