With an input type="image" what it submits is [name].x and [name].y indicating the x,y co-ordinates of where you clicked on the button.
So try request.getParameter("button.x");
This is specified in the HTML Spec.
[edit]
Just reread your message and noticed your original intention.
No you can't use the input type="image" as a switch with different values in IE. No value that IE will submit is useful in telling which button was clicked.
Take a look here:
http://www.cs.tut.fi/~jkorpela/forms/imagebutton.html#submit Cheers,
evnafets
[ August 25, 2005: Message edited by: Stefan Evans ]