jQuery: Smooth scroll

gistfile1.js

jQuery('a[href^="#"]').bind('click.smoothscroll',function (e) {
    		e.preventDefault();
    		var target = this.hash;
        	$target = jQuery(target);
    		jQuery('html, body').stop().animate({
        	'scrollTop': $target.offset().top
	    }, 500, 'swing', function () {
	        window.location.hash = target;
	    });
	});