Modern Html, CSS and Javascript features

The HTML editor works in Internet Explorer 7 emulation mode by default. Internet Explorer 7 does not support many modern HTML, CSS and Javascript features. If you want the editor to emulate newer versions of Internet Explorer, then you should change the default emulated IE mode using a special Windows Registry key. The key should be located at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION" and have the name of your EXE file. The key value defines which version of Internet Explorer will be emulated. Available values can be found in the following MSDN article http://msdn.microsoft.com/en-us/library/ee330730(v=vs.85).aspx