How does scrolling work? [closed]

How does scrolling work? [closed]

References

Reference NO 1

http://stackoverflow.com/questions/16968517/how-does-parallax-scrolling-work

Reference NO 2

https://support.mozilla.org/questions/956201

Reference NO 3

http://support.mozilla.org/questions/803581

Reference NO 4

http://www.msoutlook.info/question/441

Reference NO 5

https://support.techsmith.com/entries/22891532-Snagit-Scrolling-is-not-working

Reference NO 6

http://answers.yahoo.com/question/index?qid=20080403155753AAQ32IW

Reference NO 7

https://github.com/paulirish/infinite-scroll/issues/363

Reference NO 8

http://synergy-foss.org/osqa/questions/1166/mouse-scrolling-does-not-work