How to display an XML as Excel sheet in a web browser

Hi all..

Using pure HTML, I can do <meta http-equiv="content-type"
content="application/vnd.ms-excel" /> and the HTML table is shown as an Excel
spreadsheet.

I have an XSL that I want to achieve the same, but that meta tag doesn't work.
When I see the HTML source, I see <META http-equiv="Content-Type"
content="text/html; charset=UTF-16"> before mine.

Any help will be greatly appreciated

Jaime