First go to http://www.w3.org/Math/and see if the "test page" works If not, you have to go to http://www.mozilla.org/projects/mathml/fonts/ to download and install the MathsML fonts(HOW MANY PEOPLE (visitors) ARE GOING TO DO THAT WHEN YOU HAVE MATHSML AT YOUR WEB SITE)The test at http://www.w3.org/Math/ failed and I got the following window pop-upTo properly display the MathML on this page you need to install the following fonts:CMSY10, CMEX10, Math1, Math2, Math4.For further information see:http://www.mozilla.org/projects/mathsML/fontsWell I went to the web site and downloaded "mit-mathml-fonts-1.0-fc1.msi" it is about 2 meg in file size (for windows 98). Just for interest I did a file search on math*.* and found I now have lots of math*.ttf fonts in the windows\fonts folder. Now the test at http://www.w3.org/Math/ works I just need to write the file,