function confirmation(text, loca)
{
  if (confirm(text))
  {
    location.replace(loca)
  }
}

function diving(div_id)
{
  if (document.getElementById(div_id).style.display == "none")
  {
    document.getElementById(div_id).style.display="block";
  }
  else
  {
    document.getElementById(div_id).style.display="none";
  }
}