Revert "adding buttons for operation detail/back to page top."

This reverts commit 86114abf3a9b5d3d7a594fe4e30654913302dfb3.

Conflicts:
	index.html
	js/js.js
	style.css
Revert "adding buttons for operation detail/back to page top."

This reverts commit 86114abf3a9b5d3d7a594fe4e30654913302dfb3.

Conflicts:
	index.html
	js/js.js
	style.css