function focusform() {
  if (document.getElementById('u')) {
    document.getElementById('u').focus();
  }
}

function check(box1, box2) {
  var tmp1 = document.getElementById(box1);
  var tmp2 = document.getElementById(box2);
  if (tmp1.checked == true) {
    tmp2.checked = false;
  }
}

function checkanother(box1, box2, mode) {
  var tmp1 = document.getElementById(box1);
  var tmp2 = document.getElementById(box2);
  if (tmp1.checked == true && mode == 'on') {
    tmp2.checked = true;
  } else if (tmp1.checked == false && mode == 'off') {
    tmp2.checked = false;
  }
}