// JavaScript Document
function checkCheckBox(f) {
  if (f.agree.checked == false) {
    alert('Please check the box to continue.');
    return false;
  } else
    return true;
}
// do function
function checkcheckboxes(f) {
  if (f.c1.checked == false || f.c2.checked == false || f.c3.checked == false || f.c4.checked == false || f.c5.checked == false) {
    alert('Sorry but one or more of the checkboxes needs checking.');
    return false;
  } else
    return true;
}