I have a web page that can be exported to HTML or Excel and displayed inside
IE(based on the MIME type). This page contains thumbnail images with a
hyperlink attached that when the report is run to HTML, clicking on the image
opens a new window to display the full image.

When the report is exported to Excel (embedded in IE), clicking the image
opens the full image in the same window. How can I get the Excel output to
open the full image in a new window?