function ZobrazOkno(dataSource) 
    { 
     xHttp = VytvorXMLHttp();
     xHttp.open("GET", dataSource); 
     xHttp.onreadystatechange = function()
     { 
       if (xHttp.readyState == 4 && xHttp.status == 200) 
       { 
             var vypis = document.getElementById("contactArea");
             vypis.innerHTML = xHttp.responseText;
       }
     } 
     xHttp.send(null); 
    }

     
    
function VytvorXMLHttp() 
  {
      var xmlHttp= false;
  
      if (window.ActiveXObject) 
          {xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");}
       else if (window.XMLHttpRequest) { // need a new one each time for IE7 because it's just IE6 in a frock
          {xmlHttp = new XMLHttpRequest();}
          }
    return xmlHttp;
  }