This form is submitted to the formsToXML.jsp and the output is returned to the browser as an XML document. Since there is a field indicating an XSL URL, and an indicator showing transformation should take part on the client side the dosument is returned with an XSL directive for client side transformation. An XML compliant browsers will process the XML with the XSL and display the resulting output. If you view the source of the resulting page you will note that it is an XML page, not an HTML page.
NOTE: Due to bugs in the Microsoft implementation of XSL processing this translation does not work in all version of Internet Explorer, viewing the source will show the XML is correctly formatted and that the XSL directive is included