function clsAJAXAddress() {
    this.m_oCityObj = null;
    this.m_oStreetObj = null;
    
    
    this.getAddress  = function (p_sPostalcode, p_sNumber, p_sCityObj, p_sStreetObj) {
        var oRequest = new clsHTTPRequest();
        this.m_oCityObj = document.getElementById(p_sCityObj);
        window.m_oCityObj = this.m_oCityObj;
        this.m_oStreetObj = document.getElementById(p_sStreetObj);
        window.m_oStreetObj = this.m_oStreetObj;
        var self = this;
        if (p_sPostalcode.toString() != '' && p_sNumber.toString() != '') {
            oRequest.setRequestURI('/ajax_exec/getAddressByPostalcode.php');
            oRequest.addParam('postalcode', encodeURIComponent(p_sPostalcode));
            oRequest.addParam('number', encodeURIComponent(p_sNumber));
            oRequest.postXML(self.setAddress);
        }
    }
    
    this.setAddress = function (p_oDOM) {
        if (p_oDOM) {
            var oRoot = p_oDOM.getElementsByTagName('response').item(0);
            var oError = oRoot.getElementsByTagName('error').item(0);
            if (oError && oError.childNodes.length >0) {
                
                switch(oError.getAttribute('code')) {
                    case "1": 
                        //alert('Ongeldige postcode'); 
                        break;
                    case "2": 
                        //alert('Geen huisnummer opgegeven'); 
                        break;
                    case "3": 
                        document.getElementById('city').value = "";
                        document.getElementById('city').readOnly = false;
                        document.getElementById('address_street').value = "";
                        document.getElementById('address_street').readOnly = false;
                        document.getElementById('address_street').focus(); 
                        alert('Onbekende huisnummer en postcode combinatie'); break;
                        
                    case "4":
                        alert(oError.firstChild.firstChild.nodeValue); break;
                    default:
                        alert('onbekende fout ' + oError.getAttribute('code'));
                }
                
            } else {
                //update address
                var oAddress= oRoot.getElementsByTagName('address').item(0);
                if (oAddress.getElementsByTagName('city').length) {
                    if (oAddress.getElementsByTagName('city').item(0).childNodes.length) {
                    window.m_oCityObj.value = oAddress.getElementsByTagName('city').item(0).firstChild.nodeValue;
                    window.m_oStreetObj.value = oAddress.getElementsByTagName('street').item(0).firstChild.nodeValue;
                    }
                }
            }
        }
    }

}