1. Enter the starting dimensions of the image.
2. Then enter the dimensions you would like to conform the image to.
ex. You have an image that is 800 x 600, and you need it to fit the image
proportionaly in a 525 pixel wide area. Enter 800 for the width and 600 for
the height in the before dimensions. Then enter 525 in the after dimensions
width. The script will then compute the proportional height for you.