The web page you have just visited was created with help of SpreadsheetConverter.
SpreadsheetConverter makes it easy to create interactive web pages. You create a Microsoft Excel workbook and let SpreadsheetConverter convert the spreadsheet into a web page. The generated web page is completely self-contained and doesn't use Microsoft Excel.
The web page generated by SpreadsheetConverter to HTML/JavaScript works on any web server, since all calculations are done inside the web browser.
So many uses: as versatile Excel!