function CalculateOrder(form)
{
if (form.users.value == "2")
 {	 
 form.a3.value = 9.99;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 2 user"
 form.total.value = form.a3.value;
 }
 if (form.users.value == "2")
 {	 
 form.a3.value = 12.50;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 2 user"
 form.oneoff.value = form.a3.value;
 }
if (form.users.value == "3" )
 {
 form.a3.value = 14.99;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 3 users";
 form.total.value = form.a3.value;
 }
if (form.users.value == "3")
 {	 
 form.a3.value = 17.50;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 3 user"
 form.oneoff.value = form.a3.value;
 }
 if (form.users.value == "4" )
 {
 form.a3.value = 19.99;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 4 user";
  form.total.value = form.a3.value;
 }
  if (form.users.value == "4")
 {	 
 form.a3.value = 21.50;
 form.item_name.value = "VPNUK UK Dedicated IP Account - 4 user"
 form.oneoff.value = form.a3.value;
 }
}