jquery.eventspolyfill.js

## jquery.eventspolyfill.js
(function ($) {

	if ($.fn.on === undefined) {
		$.fn.on = function (types, selector, data, fn) {

			var origFn, type;

			// Types can be a map of types/handlers
			if ( typeof types === "object" ) {
				// ( types-Object, selector, data )
				if ( typeof selector !== "string" ) {
					// ( types-Object, data )
					data = data || selector;
					selector = undefined;
				}
				for ( type in types ) {
					$.on( type, selector, data, types[ type ], one );
				}
				return this;
			}

			if ( data === null && fn === null ) {
				// ( types, fn )
				fn = selector;
				data = selector = undefined;
			} else if ( fn === null ) {
				if ( typeof selector === "string" ) {
					// ( types, selector, fn )
					fn = data;
					data = undefined;
				} else {
					// ( types, data, fn )
					fn = data;
					data = selector;
					selector = undefined;
				}
			}
			if ( fn === false ) {
				fn = returnFalse;
			} else if ( !fn ) {
				return this;
			}

			return this.each( function( types, selector, data, fn ) {
				jQuery.event.add( this, types, fn, data, selector );
			});
		};
	}


	if ($.fn.off === undefined) {
		$.fn.off = function () {
			var handleObj, type;
			if ( types && types.preventDefault && types.handleObj ) {
				// ( event )  dispatched jQuery.Event
				handleObj = types.handleObj;
				jQuery( types.delegateTarget ).off(
					handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
					handleObj.selector,
					handleObj.handler
				);
				return this;
			}
			if ( typeof types === "object" ) {
				// ( types-object [, selector] )
				for ( type in types ) {
					this.off( type, selector, types[ type ] );
				}
				return this;
			}
			if ( selector === false || typeof selector === "function" ) {
				// ( types [, fn] )
				fn = selector;
				selector = undefined;
			}
			if ( fn === false ) {
				fn = returnFalse;
			}
			return this.each(function() {
				jQuery.event.remove( this, types, fn, selector );
			});
		};
	}
}(jQuery));

## test.html
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>jQuery.fn.on polyfill</title>
	</head>
	<body>
		<div class="message"></div>

		<a href="#" class="off">Remove Events</a>

		<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
		<script src="jquery.eventspolyfill.js"></script>
		<script>
			$( document ).on( 'click', function () {
				$( '.message' ).text( 'clicked ' + ( +new Date() ) )
			});


			$( '.off' ).on( 'click', function () {
				$( document ).off( 'click' );
			});
		</script>

	</body>
</html>