function add_tape_to_cart(tape_number,form)
{
window.open("https://www.paypal.com/cart/add=1&business=info%40angela-stevens.co.uk&item_name=Angela+Stevens+Audio+Yoga+"+tape_number+"&amount=12.00&return=http%3A//www.angela-stevens.co.uk/tapes.html&cancel_return=http%3A//www.angela-stevens.co.uk&currency_code=GBP","cartwin","width=600,height=400,scrollbars,location,resizable,status");
}