function changeDodaciAdresa() {
         var addressesForm =  document.getElementById("addressesForm");
         var dodaciAdresaBlock = document.getElementById("dodaciAdresaBlock");
         if (addressesForm.isDeliveryAddress[1].checked) {
             // ANO, dodaci adresu zobrazit
             dodaciAdresaBlock.style.display="block";
         }
         if (addressesForm.isDeliveryAddress[0].checked) {
             // NE, dodaci adresu nezobrazit
             dodaciAdresaBlock.style.display="none";
         }
}

function changeCompanyOrPrivate() {
         var addressesForm =  document.getElementById("addressesForm");
         var icoAndDicBlock = document.getElementById("icoAndDicBlock");
         //var icoRow = document.getElementById("icoRow");
         //var dicRow = document.getElementById("dicRow");
         var nazevFirmyLabel = document.getElementById("nazevFirmyLabel");
         var jmenoLabel = document.getElementById("jmenoLabel");
         if (addressesForm.companyOrPrivate[0].checked) {
             // soukroma osoba
             jmenoLabel.style.display="inline";
             nazevFirmyLabel.style.display="none";
             icoAndDicBlock.style.display="none";
             //icoRow.style.display="none";
             //dicRow.style.display="none";
         }
         if (addressesForm.companyOrPrivate[1].checked) {
             // firma
             jmenoLabel.style.display="none";
             nazevFirmyLabel.style.display="inline";
             icoAndDicBlock.style.display="block";
             //icoRow.style.display="block";
             //dicRow.style.display="block";
         }

}

function addListenerForChanges(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
}