// u kazdeho stisku, zmeny hodoty, ktere ma vliv na koncovou cenu, zavolat take funkci hodnota();
function ajax(param, kam)
{

    var httpRequest;
    var stranka = "text.php?"+param;
    
    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)
        {
            document.getElementById(kam).value = httpRequest.responseText;
        }      
    }       
} 

function celkovaCena(){
	
	cesta = (document.getElementById("dir2").checked==true) ? "twow" : "onew" ;
	cil = document.getElementById("dirto").value;
	pocet_lidi = document.getElementById("pocet_lidi").value; 
	param = "tamzpet="+cesta+"&mesto="+cil+"&pocetcestujicich="+pocet_lidi;

	ajax(param,"tot");
}