Q:

how to select automatically left side link, when I scroll the html page up and down of right side content?

I am trying to make a page, that body contain two part left and right. left contain some anchor tag whose content are contain right. as like enter link description here
Now, I want to scroll page and select automatically left anchor according to right side content. 
Please help me any one.....

A:

See this link https://davist11.github.io/jQuery-One-Page-Nav/filter.html
check html, css and jquery by view source.

