In HTML this is done with named anchors and links to those anchors. Place a named anchor near where you want to jump to in the page:
The name can be any valid HTML name but, it must be unique. Then you can jump to that section on the page using (let's say this is your index.html):
That will work on the page itself or from another page. On the page itself, you can also use this shorthand:
<a href="index.html#aboutus">About Us</a>
Notes: Named anchors can have lass than satisfactory results if there isn't enough other content on the page to make a jump to that anchor much different than loading the page in the ordinary manner.
<a href="#aboutus">About Us</a>