If I have a hyperlink that ends in a filename (say href="http://blah/work.xls"

How do I control on the client what happens when the link is clicked. For example, does it open excel embeded in ie, open excel external to ie or open a save to/openwith dialog?

I have documents that I want to push out to clients, but I am often getting the document opened in the client browser instead of the choice to open it or save it or open it external to ie.

To make it a little more complicated, it seems the firefox doesn't behave the same way as ie.

Help?