Javascript multi-touch on win 7

Is there a good solution for developing web apps that can work with iOS multitouch and Win 7 multitouch? The restriction on using a specific browser like firefox or chrome is acceptable, but all the browser combinations I've tried don't seem to work with any multitouch demo apps I've tried, for example:

• The demo version of the Touch Events from mozilla
• http://blogs.msdn.com/b/ie/archive/2011/10/19/handling-multi-touch-and-mouse-input-in-all-browsers.aspx

This (very cool) firefox multitouch demo doesn't seem to have a real demo page that I can find, and the Moz event functions used seems to be discouraged anyway according to Touch Events . Any pointers you can give would be greatly appreciated.