This article will provide you with the best practice for the scrolling function on your pages.
Best Practice
Place Important Information and Action Items at the Top: Crucial navigation elements and content that call to action should be at the top of any page. Long-page content that will likely scroll is acceptable, as long as it is made obvious that there is more to see below.
Reasoning: With a multitude of device sizes in use today, there is no longer an ideal screen size. Different devices display web pages at varying sizes and a user may miss some information if it is not easily accessible at the top of a page. See Responsive Web Design for more information about how to adapt websites to fit multiple devices.
Resources: Infinite Scrolling Is Not for Every Website by the Nielsen Norman Group