function change_city(sel){
 cid = sel.value;
 ajax_get_city(cid);
}

function ajax_get_city(cid){
  url = "http://"+document.location.hostname+"/scripts/get_city.php";	
  http_request = false;

        if (window.XMLHttpRequest) { 
            http_request = new XMLHttpRequest();            
        } else if (window.ActiveXObject) { 
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }
        if (!http_request) {
            alert('Cannot create an XMLHTTP instance');
            return false;
        }

  httpstr = "cid="+cid;        
  http_request.open('POST', url, true);
  http_request.onreadystatechange = rec_written;
  http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
  http_request.send(httpstr);
}

function rec_written() {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      city_diler = http_request.responseText;
      ar_city_diler = city_diler.split("%");
      document.getElementById('city').innerHTML = ar_city_diler[0];
      document.getElementById('diler').innerHTML = ar_city_diler[1];
      document.getElementById('city_name').innerHTML = ar_city_diler[2];
    } else {
	alert('there was a problem with the ajax request');	
    }
  }
}

function change_diler(sel){
 did = sel.value;
 ajax_get_diler(did);
}

function ajax_get_diler(did){
  url = "http://"+document.location.hostname+"/scripts/get_diler.php";	
  http_request = false;

        if (window.XMLHttpRequest) { 
            http_request = new XMLHttpRequest();            
        } else if (window.ActiveXObject) { 
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }
        if (!http_request) {
            alert('Cannot create an XMLHTTP instance');
            return false;
        }

  httpstr = "did="+did;        
  http_request.open('POST', url, true);
  http_request.onreadystatechange = rec_written2;
  http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
  http_request.send(httpstr);
}

function rec_written2() {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      diler_name = http_request.responseText;
      ar_diler_name = diler_name.split("%");
      document.getElementById('diler').innerHTML = ar_diler_name[0];
      document.getElementById('city_name').innerHTML = ar_diler_name[1];
    } else {
	alert('there was a problem with the ajax request');	
    }
  }
}