<script type="text/javascript">

var selectedTask = null;
var selectedClass = '';

function changePassword()
{
  if (document.change_password.pw.value.length < 4)
    {
      alert('Invalid password');
      return;
    }

  if (document.change_password.pw.value != document.change_password.confirm.value)
    {
      alert("Passwords don't match.");
      return;
    }

  document.change_password.submit();
}

</script>