Great script, but it requires some upkeep. You choose what you have up top -- then choose what you want down below. Click Compute and poof -- you get the conversion. That is, if the conversion numbers are correct. Hence, the upkeep. But if you can keep the numbers up, it's quite functional.
Please note: This script is being offered in simple text format. When you click to Grab the Script, the text should display. Internet Explorer and AOL users may get a blank page or the script may run and produce the effect. If this happens, choose SAVE AS from the FILE menu and save the blank or compiled page.