To scroll to top of the page with jQuery use the following:
$('html,body').animate({scrollTop: 0}, 500);
to animate - scroll to an element on the page calculate it's top offset and then scroll to that:
$('html,body').animate({scrollTop: $("#someContainer").offset().top}, 500);
If you just want to scroll to somewhere in the page as quickly as possible without animation use the scrollTop method.
$('html,body').scrollTop($("#someContainer").offset().top);