AJAX from HTTP to HTTPS

[kristofo]

On my page I have the FORM with one INPUT field. On SUBMIT this form I use JavaSript function "test_kod(this)" to valid is the the enetered value correct or not. But in the Internet Explorer ver <=9 the OPEN method allways fall with error "access denied".
WHAT AM I DOING WRONG?
P.S. Because of some limitations I cant use JQUERY.

function test_kod(field) {
 var req = createXMLHTTPObject();
 if (!req) { 
 return false;
 };
 try {
 [B]//in IE <= 9 in this place debuger allways return error "access denied"[/B] 
 req.open("GET","https://dad-atlas.datasolutions.pl/karta.php?karta="+field.value,false);
 }
 catch(e){
 return false;
 }
 req.setRequestHeader('User-Agent','XMLHTTP/1.0');
 req.onreadystatechange = function () {
 if (req.readyState != 4) return;
 if (req.status != 200 && req.status != 304) {
  return false;
 }
 if (req.responseText == "TAK") {
  return true;
 } else {
  return false;
 };
 }
 if (req.readyState == 4) return;
 req.send();
}

var XMLHttpFactories = [
 function () {return new XMLHttpRequest()},
 function () {return new ActiveXObject("Msxml2.XMLHTTP")},
 function () {return new ActiveXObject("Msxml3.XMLHTTP")},
 function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
 var xmlhttp = false;
 for (var i=0;i<XMLHttpFactories.length;i++) {
 try {
  xmlhttp = XMLHttpFactories[i]();
 }
 catch (e) {
  continue;
 }
 break;
 }
 return xmlhttp;
}

[coopster]

Welcome to WebmasterWorld, kristofo.

It looks like you should be getting a valid object in your "req" variable but have you tried dumping it to the console to be certain?

[rainborick]

If the protocol (http/https) used to load the page where the AJAX code is executed is not the same as the URL being called by the AJAX function, it's a violation of the same origin policy [en.wikipedia.org]. The exact implementation varies by browser, unfortunately.