Sitepoint reference says
Internet Explorer for Windows versions 5.5 and above support the non-standard property zoom, which sets the magnificatio
To complete the answer of scale transformations: why you not addressing IE as well? There is a specific -ms-zoom property, which will work in IE only: http://msdn.microsoft.com/en-us/library/ie/ms531189(v=vs.85).aspx
-ms-zoom