function setVat(vat) {
  var url;
  url = window.location.pathname+"?incl_tax="+vat;
  window.location.href = url;
}

function openWin( windowURL, windowName, windowFeatures ) {
	return window.open( windowURL, windowName, windowFeatures ) ;
}

function useInvoiceDelivery() {
  if(document.getElementById("delivery")) {
    var checked = document.getElementById("delivery").checked;
    if(checked == true) {
      if(document.getElementById("delivery_info")) {
        document.getElementById("delivery_info").style.display = "none";
      }

      if(document.getElementById("delivery_company")) {
        document.getElementById("delivery_company").className = "formfield contactform";
      }
      if(document.getElementById("delivery_name")) {
        document.getElementById("delivery_name").className = "formfield contactform";
      }
      if(document.getElementById("delivery_address")) {
        document.getElementById("delivery_address").className = "formfield contactform";
      }
      if(document.getElementById("delivery_zipcode")) {
        document.getElementById("delivery_zipcode").className = "formfield contactform";
      }
      if(document.getElementById("delivery_city")) {
        document.getElementById("delivery_city").className = "formfield contactform";
      }
      if(document.getElementById("delivery_country")) {
        document.getElementById("delivery_country").className = "formfield contactform";
      }

    } else {
      if(document.getElementById("delivery_info")) {
        document.getElementById("delivery_info").style.display = "";
      }

      if(document.getElementById("delivery_company")) {
        document.getElementById("delivery_company").className = "formfield contactform required";
      }
      if(document.getElementById("delivery_name")) {
        document.getElementById("delivery_name").className = "formfield contactform required";
      }
      if(document.getElementById("delivery_address")) {
        document.getElementById("delivery_address").className = "formfield contactform required";
      }
      if(document.getElementById("delivery_zipcode")) {
        document.getElementById("delivery_zipcode").className = "formfield contactform required";
      }
      if(document.getElementById("delivery_city")) {
        document.getElementById("delivery_city").className = "formfield contactform required";
      }
      if(document.getElementById("delivery_country")) {
        document.getElementById("delivery_country").className = "formfield contactform required";
      }
    }
  }
}

function changeColor(id)
{
    var btnclr = document.getElementById(id);
    btnclr.style.backgroundColor = btnclr[btnclr.selectedIndex].style.backgroundColor;
    btnclr.style.color = btnclr[btnclr.selectedIndex].style.color;
}

function changeAction(url)
{
  document.frm_product.action = url;
}