$(document).ready(function () {

​

            $('body').on('click', 'a.disabled', function (event) {

                event.preventDefault();

            });

​

            jQuery.fn.extend({

                disable: function (state) {

                    return this.each(function () {

                        var $this = $(this);

                        if ($this.is('input, button'))

                            this.disabled = state;

                        else

                            $this.toggleClass('disabled', state);

                    });

                }

            });

​

            // Disabled on all:

            $('input, button, a').disable(true);

​

            // Enabled on all:

            $('input, button, a').disable(false);

​

            $('.link_1').click(function () {

​

                alert('link_1 clicked');

​

            });

​

            $('.link_2').click(function () {

​

                alert('link_2 clicked');

​

            });

              $('.link_3').click(function () {

​

                alert('link_3 clicked');

​

            });

​

​

​

        });