function ajax(stranka, kam, funkce)
{
    var httpRequest;
    
    if(typeof window.ActiveXObject != 'undefined')
    {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {  
        httpRequest = new XMLHttpRequest();
    }
    httpRequest.open("GET", "./" + stranka, true);
    httpRequest.onreadystatechange= function () 
    {
        processRequest(httpRequest, kam, funkce) 
    };
    httpRequest.send(null);
}


function processRequest(httpRequest, kam, funkce) 
{
    if (httpRequest.readyState == 4)
    {
        if(httpRequest.status == 200)
        {
            if (kam) 
            {
                document.getElementById(kam).innerHTML = httpRequest.responseText;
            }
            if (funkce) 
            {
                eval(funkce + '(\'' + httpRequest.responseText + '\');');
            }
        }
        else
        {
            alert("Chyba pri nacitani stanky " + httpRequest.status +" : "+ httpRequest.statusText);
        }
    }
    else
    {
        if (kam != '') 
        {
            document.getElementById(kam).innerHTML = 'Loading...';
        }
    }
       
}  

function mojefunkce(parametr)
{
    alert(parametr);
}