Simple paypal button

Hi im trying to create a simple paypal button that fires of a page with the item selected. The coding works fine BUT i want the total to be in British pounds and not US dollar. Anyone know how i can modify the code to make it be in pounds?

heres my coding:


on(release) {
getURL("https://www.paypal.co.uk/cart/add=1&business=me@myemail.co.uk&item_name=Secret_Graden_Necklace&amount=32.00&shipping=0.00&shipping2=0.00&handling=0.00&return=http://www.paypal.com&cancel_return=http://www.paypal.co.uk", _paypal);
}