Changing a value on my page

[Andy Levy]

Hi

I have a total cost listed on my page, followed by 3 radio buttons named
postage. What i would like is for the total price that is displayed on the
page to change depending on radio button that is clicked e.g. US Rate, UK
Rate, Eur Rate. Im not sure how to do this without sending submitting the
form to a new page which is not possible given this situation

Any help much appreciated.

Andy