1) copy shipping information from web page #1 by allowing user to highlight text to be copied and pressing control-c (or via right click)
ie:
john doe
123 main st.
seattle, wa 98136
206-222-2212
2) parse copied information into individual fields (name, address1, address2, city, state, zip, phone) - this data can be stored in an array in memory
3) auto-fill fields on web page #2 with the information copied from web page #1