var dest;


function processStateChange(){ 

contentDiv = document.getElementById(dest);

  if (request.readyState == 4){
    if (request.status == 200){
	response = request.responseText;
	contentDiv.innerHTML = response;

    } else {
	contentDiv.innerHTML = "Error: Status "+request.status;
    } 
  }
if(request.readyState == 1)
{
document.getElementById(dest).innerHTML = "Loading...";
} 

}

var request;
var dest;
function loadHTML(URL, destination){

  dest = destination;
  if (window.XMLHttpRequest){
    request = new XMLHttpRequest();
    request.onreadystatechange = processStateChange;
    request.open("GET", URL, true);
    request.send(null);

  } else if (window.ActiveXObject) {
    request = new ActiveXObject("Microsoft.XMLHTTP");
    if (request) {
	request.onreadystatechange = processStateChange;
	request.open("GET", URL, true);
	request.send();
    } 
  } 
}

function processReqChange() 
{
    // only if req shows "complete"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            // ...processing statements go here...
      response = req.responseXML.documentElement;

      method = response.getElementsByTagName('method')[0].firstChild.data;

      result = response.getElementsByTagName('result')[0].firstChild.data;

      eval(method + '(\'\', result)');
        } else {
            alert("There was a problem retrieving the XML data:\n" + req.statusText);
        }
    }
}

var req;

function loadXMLDoc(url) {
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {

        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}

function checkName(input, response)
{

  if (response != ''){ 
    // Response mode
    message   = document.getElementById('nameCheckFailed');
    if (response == '1'){
      message.className = 'error';
    }else{
      message.className = 'hidden';
    } 
  }else{
    // Input mode

    url  = 'http://195.91.205.210:8381/start/jquery/checkUserName.php?q=' + input;

    loadXMLDoc(url);
  }
}