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.
Grab the Script
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.