How to Alert the User on whether their Web Browser is a Supported Browser

How to Alert the User on whether their Web Browser is a Supported Browser

Hello. I'm interested in writing a script within an HTML view or within the html coding of the View to notify the user of whether or not they are using a "supported browser" on my Zoho App.(I got over 100 Zoho users on my App)


I get a lot of help desk calls and most of them are related to unsupported  web browsers such as Safari & IE version 8. 


Any suggestions for this would be greatly appreciated.


Thanks.