how can I do something similar to "multipart/mixed" ?

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I have a search engine site written in Perl.
How could I display a temporarily page while the system retrieving
data, then a page refresh, display the search result in a new page?
I try to do it using "Content-Type: multipart/mixed;", it's working
well in Netscape and firefox,but no luck in IE.
Is there any standard way in doing that?  
Thanks a lot.

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