var scrollPage = function(top, offset, speed) {

	top = typeof top !== 'undefined' ? top : 0;
	offset = typeof offset !== 'undefined' ? offset : 0;
	speed = typeof speed !== 'undefined' ? speed : 500;

	var page = $('html, body');

	// Stop animation if user scrolls
	page.on("scroll mousedown wheel DOMMouseScroll mousewheel keyup touchmove", function() {
   		page.stop();
	});

	page.animate({scrollTop: top - offset}, speed, 'swing', function() {
		page.off("scroll mousedown wheel DOMMouseScroll mousewheel keyup touchmove");
	});
};