Change CSS class after scrolling 100% screen height down

Change CSS class after scrolling 100% screen height down

References

Reference NO 1

http://stackoverflow.com/questions/15205313/change-css-class-after-scrolling-100-screen-height-down

Reference NO 2

http://stackoverflow.com/questions/12558311/add-remove-class-with-jquery-based-on-vertical-scroll

Reference NO 3

http://stackoverflow.com/questions/12238114/changing-css-properties-on-scroll

Reference NO 4

http://stackoverflow.com/questions/4907872/changing-an-elements-css-position-after-scrolling-down-the-page

Reference NO 5

http://stackoverflow.com/questions/9214040/how-to-properly-set-the-100-div-height-to-match-document-window-height

Reference NO 6

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Reference NO 7

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Reference NO 8

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