function get_cities()
{
 plik = "http://"+location.host+"/scripts/auta_uzywane/get_cities.php?q="+document.xform2.regionid.selectedIndex; 
 element = document.getElementById("cities");
 xml = null;
 element.innerHTML="";
 try{
  xml = new ActiveXObject("Microsoft.XMLHTTP"); // IE
 }catch(e){
  try {
   xml = new XMLHttpRequest(); // Mozilla/FireFox/Opera
  }catch(e){
   xml = null;
  }
 }
 if(xml != null){
  xml.onreadystatechange = function(){
   if(xml.readyState==4){
    element.innerHTML = "<select name=\"cityid\" class=\"w150\"><option value=\"\">wybierz</option>"+xml.responseText+"</select>";
   }
  }
  xml.open("GET", plik, true);
  xml.send(null);

 }
 
 return false;
}