// JavaScript Document
//Gets the browser specific XmlHttpRequest Object 
function getXmlHttpRequestObject() {
 if (window.XMLHttpRequest) {
    return new XMLHttpRequest(); //Mozilla, Safari ...
 } else if (window.ActiveXObject) {
    return new ActiveXObject("Microsoft.XMLHTTP"); //IE
 } else {
    //Display our error message
    alert("Your browser doesn't support the XmlHttpRequest object.");
 }
}
var receiveReq = getXmlHttpRequestObject();
//Initiate the AJAX request
function makeRequest1(url, param) {
//If our readystate is either not started or finished, initiate a new request
 if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
   //Set up the connection to captcha_test.html. True sets the request to asyncronous(default) 
   receiveReq.open("POST", url, true);
   //Set the function that will be called when the XmlHttpRequest objects state changes
   receiveReq.onreadystatechange = updatePage; 

   //Add HTTP headers to the request
   receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   receiveReq.setRequestHeader("Content-length", param.length);
   receiveReq.setRequestHeader("Connection", "close");

   //Make the request
   receiveReq.send(param);
 }   
}
function updatePage() {
 //Check if our response is ready
 if (receiveReq.readyState == 4) {
   //Set the content of the DIV element with the response text
   document.getElementById('result').innerHTML = receiveReq.responseText;
    if(receiveReq.responseText=="jo")
    {
   document.getElementById('kapca').style.visibility='hidden';
   document.getElementById('txtCaptcha').value='';
   document.getElementById('result').innerHTML='';
   document.getElementById('result').innerHTML='';
   document.getElementById('username').disabled = false;
   document.getElementById('username').value='';   
   document.getElementById('password').disabled = false;
   document.getElementById('password').value=''; 
   document.getElementById('valasz').innerHTML='';
    }
   //Get a reference to CAPTCHA image
   img = document.getElementById('imgCaptcha'); 
   //Change the image
   img.src = 'create_image.php?' + Math.random();
 }
}
function getParam() {
 //Set the URL
 var url = 'tartalom/captcha.php';
 //Set up the parameters of our AJAX call
 var postStr = document.getElementById('txtCaptcha').name + "=" + encodeURIComponent(document.getElementById('txtCaptcha').value );
 //Call the function that initiate the AJAX request
 makeRequest1(url, postStr);
}
function press(e)
	{     
	if (!e) var e = window.event;
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
	if (code==13) 
	{
	getParam();
	}
	}