function geef_adres(el_postcode,el_huisnummer,el_land,el_straat,el_plaats) {
        var httpRequest;

        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        
        var postcode = document.getElementById(el_postcode).value;
        var huisnummer = document.getElementById(el_huisnummer).value;
        var land = document.getElementById(el_land).value;
        
        httpRequest.onreadystatechange = function() { toon_adres(httpRequest,el_straat,el_plaats); };
        httpRequest.open('GET', './geef_adres.php?pc='+postcode+'&hnr='+huisnummer+'&cntr='+land, true);
        httpRequest.send('');

    }

    function toon_adres(httpRequest,el_straat,el_plaats) {

        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
            	tmp = httpRequest.responseText.split("|||");
            	
            	if (tmp[0]) {
	            	document.getElementById(el_straat).value = tmp[0];
	            	document.getElementById(el_plaats).value = tmp[1];
            	}
            } else {
            }
        }

    }