function checkInt(val,text){
  var v = val.value;
  if(v == ''){
   alert(text);
   val.focus();
   return false;
  }
  var valid = new RegExp("^[0-9]*$").exec(v);
  if(!valid) { 
    alert(text);
    val.focus();
    return false
  }return true;
}
function verifyOrder(form){
  
}
function nextOrderStep(){
//var form = document.getElementById('shoppingcart_form');
var form = document.shoppingcart_form; //getElementById('shoppingcart_form');
form.orderstep.value =parseInt(form.orderstep.value)+1;
form.action = '/shoppingcart';
form.submit();
}
function previousOrderStep(){
var form = document.getElementById('shoppingcart_form');
form.action = '/shoppingcart';
form.orderstep =parseInt(form.orderstep.value)-1;
form.submit();
}
function updateOrder(){
var form = document.getElementById('shoppingcart_form');
for(var i=0;i<form.length;i++){
  var name = form[i].name;
  if(name.substr(0,6) == 'aantal'){
    if(!checkInt(form[i],translation.order_invalid_amount)){return false;}
   }
}
form.action = '/updateShoppingCart';
form.submit();
}
function verifyOrder(){
var form = document.getElementById('shoppingcart_form');
 if(!form.agree.checked){
  alert(translation.order_terms);
  form.agree.focus();
  return false;
 }
form.action = '/placeOrder';
form.submit();
}