function ajaxFunction()
{
  ajax.stateChanged=function(xmlDoc){
    var st = document.getElementById('or_single_price');
    if (st) st.innerHTML = xmlDoc.getElementsByTagName("or_single_price")[0].childNodes[0].nodeValue;
    
    st = document.getElementById('or_monthly_price');
    if (st) st.innerHTML = xmlDoc.getElementsByTagName("or_monthly_price")[0].childNodes[0].nodeValue;
    
    st = document.getElementById('or_yearly_price');
    if (st) st.innerHTML = xmlDoc.getElementsByTagName("or_yearly_price")[0].childNodes[0].nodeValue;

    st = document.getElementById('or_twoyearly_price');
    if (st) st.innerHTML = xmlDoc.getElementsByTagName("or_twoyearly_price")[0].childNodes[0].nodeValue;
  }
  ajax.post("/or_wh_calculator.php", ajax.stateChanged, ajax.serialize(document.forms['or_order_form']));
}