function scroll_to(div){
	$('html, body').animate({
		scrollTop: $(div).offset().top
	},1000);
}

http://www.ksnagra.com/examples/jquery/page-scroll-to-anchor-tag/

This function allows you to pass any div anchor tag as a parameter to scroll to. You can easily add easing after the 'duration' parameter in the jQuery animation function.

jQuery animated page scroll to anchor tag function

page, jquery, animation

jQuery