I want my site written in HTML5 and CSS3 to be only accessable for HTML 5 Users. So if a user is using a legacy browser just like IE 7 or something i want to make my site to be blank and show a notification, which says for example "Please update your browser to use this application". I already tried the modernizr plugin but it only supports feature detection and thats not what i want. I want to know if the users browser is able to display HTML5 and CSS3 correctly.
Is there a way to do it?