function httpRequesty()
{
/*var httpRequest; */
    
    if(typeof window.ActiveXObject != 'undefined')
    {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {  
        httpRequest = new XMLHttpRequest();
    }
}

function ajaxForm(stranka, promene, kam)
{
    httpRequesty();
    
    httpRequest.open("POST", stranka, true);
    httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    httpRequest.onreadystatechange= function () 
    {
        processRequest(httpRequest, kam) 
    };
    httpRequest.send(promene); 
}


function ajaxData(stranka, kam)
{
  ajaxRequest(stranka, kam);
}

function ajaxDataConfirm(stranka, kam)
{
 if (confirm ("Opravdu si přejete provést požadavek ?")) {
    ajaxRequest(stranka, kam);
    
    return true; }
    else {
   return false;
 }
}

function ajaxRequest(stranka, kam)
{
    httpRequesty();
    
    httpRequest.open("GET", stranka, true);
    httpRequest.onreadystatechange= function () 
    {
        processRequest(httpRequest, kam) 
    };
    httpRequest.send(null);
}

function processRequest(httpRequest, kam) 
{
    if (httpRequest.readyState == 4)
    {
        if(httpRequest.status == 200)
        {
            if (typeof kam == 'string') 
            {
                document.getElementById(kam).innerHTML = httpRequest.responseText;
            }
            if (typeof kam == 'function') 
            {
                kam(httpRequest.responseText);
            }
        }
        else
        {
            alert("Chyba pri nacitani stanky " + httpRequest.status +" : "+ httpRequest.statusText);
        }
    }
    else
    {
        if (typeof kam == 'string' && kam != '') 
        {
            document.getElementById(kam).innerHTML = '<center><img src=\"../obrazy/load.gif\" style=\"width: 20px; height: 20px;\"></center>';
        }
    }
}