interactive validation

HTML

<script src="http://www.modernizr.com/downloads/modernizr-latest.js"></script>
<input type = 'radio' id = 'r1' name = 'r1' value = 'R1'>R1</input>
<input type = 'radio' id = 'r2' name = 'r1' Value = 'R2'>R2</input>
<input type = 'text' id = 'r3'  Value = ''></input>

JavaScript

alert(Modernizr.hasEvent('blur'));
alert(Modernizr.hasEvent('blur',$('#r3')));
$('#r1').blur(function(){
  alert('blur is called')
});
$('#r3').blur(function(){
  alert('blur is called')
});