Does Modernizr.js help in showing css 3 and html 5 on older browsers and how?
I used css 3, html 5 in a web page and I want to use Modernizr to show some html5 attributes and some css 3 such as border-radius on old browsers,
Does Modernizr help in this and how run it.
Modernizr will only help you detect certain features, so you'll have to add the JS fixes yourself.
In case you want to go for a pre-packaged solution this might be of help: https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills
In your case this might be the way to go: http://css3pie.com/