var email = '';
var username = '';

function checkEmail() {
  e = document.getElementById('email').value;
  if (e!=email) {
    if (window.ActiveXObject){
      httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
      httpRequest = new XMLHttpRequest();
    }
    httpRequest.open("GET","/ajax.Check.php?table=iuser&column=email&value="+e, true);
    httpRequest.onreadystatechange= function () { processRequest('email_result'); } ;
    httpRequest.send(null);
    email = e;
    document.getElementById('email').value=e.toLowerCase();
  }
}

function checkIc() {
  e = document.getElementById('ic').value;
  if (e!=email) {
    if (window.ActiveXObject){
      httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
      httpRequest = new XMLHttpRequest();
    }
    httpRequest.open("GET","/ajax.Check.php?table=iuser&column=ic&value="+e, true);
    httpRequest.onreadystatechange= function () { processRequest('ic_result'); } ;
    httpRequest.send(null);
    email = e;
    document.getElementById('ic').value=e.toLowerCase();
  }
}

function checkUsername() {
  e = document.getElementById('username').value;
  if (e!=username) {
  if (window.ActiveXObject)
  {
    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
  }
  else
  {
    httpRequest = new XMLHttpRequest();
  }
  httpRequest.open("GET","/ajax.Check.php?table=iuser&column=username&value="+e, true);
  httpRequest.onreadystatechange= function () { processRequest('username_result'); } ;
  httpRequest.send(null);
  username = e;
  }
}

function processRequest(s) {
  if (httpRequest.readyState == 4)
  {
    if(httpRequest.status == 200)
    {
      tt = httpRequest.responseText;
      strong = document.getElementById(s);
      if (tt=='0'){
        strong.innerHTML = '<span style="color:green;font-weight:bold;font-size:12px">OK</span>';
        document.getElementById('subreg').disabled = "";
        //document.getElementById('subreg').style.color = "#ffae00";
      }else if (tt=='1') {
        strong.innerHTML = '<span style="color:red;font-weight:bold;font-size:12px">Již existuje.</span>';
        document.getElementById('subreg').disabled = "disabled";
        //document.getElementById('subreg').style.color = "#cb8a00";
      }else {
        strong.innerHTML = '<span style="color:red;font-weight:bold;font-size:12px">Neověřeno</span>';
        document.getElementById('subreg').disabled = "disabled";
        //document.getElementById('subreg').style.color = "#cb8a00";
      }
    }
    else
    {
      alert("Chyba!");
    }
  }
}