Hata extensions

hata.events.js

(function( hata ) {

	hata.extend({

		bind: function( eventType, callback ) {
			return this.each(function() {
				this.addEventListener( eventType, callback, false );
			});
		},

		unbind: function( eventType, callback ) {
			if ( callback ) {
				return this.each(function() {
					this.removeEventListener( eventType, callback );
				});

			} else {
				return this.each(function() {
					this.parentNode.replaceChild( this.cloneNode(true), this );
				});
			}
		}

	});

}( hata ));