check value in Javascript

Is this the rigth way of create a function in js? I want to add a condition. If value_1 = 'YES" then check box, if not leave it blank.

function GetNameValue1(value_1) {
  if ((value_1[2].value == "YES")) {
    ASPxCheckBox_l_default.SetChecked(true);
  }
  else {
    ASPxCheckBox_l_default.SetChecked(false);
  }
}

Select allOpen in new window