function ajax(stranka, kam)
{
    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) 
    };
    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 = 'připravuji...';
        }
    }
} 

function addElement(parentIdName, divIdName) {
  var ni = document.getElementById(parentIdName);
  /*var numi = document.getElementById('theValue');
  var num = (document.getElementById('theValue').value -1)+ 2;
  numi.value = num;*/
  var newdiv = document.createElement('div');
  /*var divIdName = 'asdf';*/
  newdiv.setAttribute('id',divIdName);
  /*newdiv.setAttribute('class','novydiv');*/
  newdiv.innerHTML = 'Jméno: '+divIdName+'<a href=\"#\" onclick=\"removeElement(\'zakladnidiv\', \''+divIdName+'\');\">X</a>';
  ni.appendChild(newdiv);
}


function removeElement(parentDiv, childDiv){
     if (childDiv == parentDiv) {
          alert("The parent div cannot be removed.");
     }
     else if (document.getElementById(childDiv)) {     
          var child = document.getElementById(childDiv);
          var parent = document.getElementById(parentDiv);
          parent.removeChild(child);
     }
     else {
          alert("Child div has already been removed or does not exist.");
          return false;
     }
}