ViewPics.aspx?url=http://www.natalieempire.com/gallery/natalie-portman&from=1&to=20&pad=1&ext=.jpg
URL
web address up to number.
If first image http://abc.com/im123.jpg use http://abc.com/im
From what number to start?
To what number to finish?
Padding how many places does number use? If image0001.jpg then use 4. If no zero padding use 1.
Extension what comes after the number? if im123abc.jpg use abc.jpg. If image123.png use .png