// pop-up window
var win = null;
function newWindow(mypage,myname,w,h,features) {
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
  var settings = 'height=' + h + ',';
  settings += 'width=' + w + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += features;
  win = window.open(mypage,myname,settings);
  win.window.focus();
}
// shipping calulations
function CalculateOrder(form)
{

if (form.os1.value == "UK Shipping" )
 {
 form.shipping.value = "4.50"; //first item rate in £ - change it to suit
 form.shipping2.value = "1.50"; //any other item rate in £ - change it to suit 
 }
 
if (form.os1.value == "International Shipping" ) 
 {
 form.shipping.value = "10.00"; //first item rate in £ - change to suit
 form.shipping2.value = "3.00"; //any other item rate in £ - change to suit
 }
}