function changeTotalPrice(totalItemPrice, postagePrice) {
	var elemTotal = document.getElementById('totalPrice');
 	elemTotal.replaceChild(document.createTextNode(totalItemPrice+postagePrice+' Kč'),elemTotal.childNodes[0]);
 	
 	var elemPostal = document.getElementById('postalPrice');
 	elemPostal.replaceChild(document.createTextNode(postagePrice+' Kč'),elemPostal.childNodes[0]);
 	

}