i got a client side javascript function which is triggered on a button click (basically, its a calculator!!). Sometimes, due to enormous data on the page, the javascript cal
In addition to all of the above, don't forget to put an invisible iframe behind the shim, so that it shows up above select boxes in IE.
Edit: This site, although it provides a solution to a more complex problem, does cover creating a modal background. http://www.codeproject.com/KB/aspnet/ModalDialogV2.aspx