ASP, Spreadsheet, hyperlink

I am writing an ASP page that uses the Spreadsheet Office 200o Web Component.

I need a cell to open up a popup window when clicked. I can only get a new page to display using hyperlink. I want this to be a popup page like the one you can create using window.open().
Can this be done? Can I do this using some window/Spreadsheet events, can a SpreadSheet cell contain a call to a javascript method?

Also...

I would like one of the columns to contain not only a hyperlink but also be displayed as an image of type *.gif. Is this doable?

Thanks in advance.